WO2024075732A1 - タイムラプス撮影機能付き培養装置および培養方法 - Google Patents
タイムラプス撮影機能付き培養装置および培養方法 Download PDFInfo
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
- C12M41/36—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of biomass, e.g. colony counters or by turbidity measurements
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
- C12M1/34—Measuring or testing with condition measuring or sensing means, e.g. colony counters
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/48—Automatic or computerized control
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- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
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- C—CHEMISTRY; METALLURGY
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- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
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- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
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- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10056—Microscopic image
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30024—Cell structures in vitro; Tissue sections in vitro
Definitions
- the present invention relates to a culture device and culture method with a time-lapse photography function that cultures cells such as embryos and performs time-lapse photography.
- Culture devices with a time-lapse photography function are known that culture cells such as embryos while also taking time-lapse photographs (see, for example, Patent Documents 1 to 3).
- a culture device with a time-lapse photography function multiple fertilized eggs (embryos) collected and processed from a single patient are placed in multiple separate wells in a single culture vessel to begin culturing, and time-lapse photography is performed at regular intervals until the embryos become transplantable (3 to 7 days), and the captured image data is saved on a recording medium.
- the time-lapse images of the development of multiple embryos are morphologically evaluated to determine whether the embryos are good or bad, and procedures such as transplantation, cryopreservation, or removal are carried out.
- the evaluation of embryo images is generally carried out using image display software that assists in embryo evaluation, and the images of the embryos over time are displayed in a chronological order on the image display software, allowing the user to check and make a judgment.
- some embryos may be terminated for cryopreservation or transplantation, or may be temporarily removed from the device for observation under a microscope or for changing the medium.
- time-lapse photography a well in the culture vessel containing an embryo is designated in advance at the dish-in time when culturing begins, and periodic photography is performed on this designated well. Therefore, even when an embryo is removed, images of wells without an embryo are taken and recorded on the recording medium. This increases the amount of recording medium used, and there is a possibility that a recording medium shortage may occur.
- the present invention aims to provide a culture device and culture method with a time-lapse photography function that can automatically record only the wells in a culture vessel in which cells exist.
- the culture device with time lapse photography function of the present invention is a culture device with time lapse photography function that places cells in each well of a culture vessel having at least one well, cultures the cells, and performs time lapse photography.
- the culture device includes a photography means that takes pictures of each well of the culture vessel at a predetermined time lapse photography cycle, a detection means that detects the presence or absence of cells in each well of the culture vessel, and an image recording means that records images of wells that are detected by the detection means as having cells among the images taken for each well by the photography means.
- the culture device with time-lapse photography function of the present invention takes pictures of each well of the culture vessel at a predetermined time-lapse period, detects the presence or absence of cells, and records only the images of the wells that are detected as having cells in the image recording means.
- the detection means preferably detects the presence or absence of cells by analyzing the image captured by the imaging means for each well. In this way, when the presence of cells is detected as a result of analyzing the image captured for each well, only the image of the well in which the presence of cells has been detected is recorded in the image recording means.
- the detection means preferably detects the presence or absence of cells at each time lapse photography cycle. This allows the presence or absence of cells to be detected each time photography is performed at a predetermined time lapse cycle, and only images of wells where cells are detected to be present are recorded in the image recording means.
- the culture device with time-lapse photography function of the present invention preferably has a notification means for notifying when the detection result by the detection means differs from the previous detection result.
- the notification means notifies the user, allowing the user to check the detection result.
- the culture device with time lapse photography function of the present invention preferably has a history recording means for recording the history of the presence or absence of cells in all wells of the culture vessel for each time lapse photography cycle.
- a history recording means for recording the history of the presence or absence of cells in all wells of the culture vessel for each time lapse photography cycle.
- the culture method of the present invention is a culture method in which cells are placed in each well of a culture vessel having at least one well, cultured, and time-lapse photography is performed, and is characterized by including the steps of photographing each well of the culture vessel at a predetermined time-lapse photography cycle, detecting the presence or absence of cells in each well of the culture vessel, and recording images of wells that are detected as having cells among the images photographed for each well.
- images are taken of each well in the culture vessel at a predetermined time lapse period, the presence or absence of cells is detected, and only images of wells where cells are detected to be present are recorded.
- the present invention it is possible to automatically record only images of wells in which cells are present for each well of a culture vessel, eliminating the need to pre-register wells that contain cells and need to be photographed when the dish is inserted, thus reducing the amount of work required. It also makes it possible to reduce the amount of recording media used to record images. Furthermore, because images of unnecessary wells that do not contain cells are not recorded, there is more freedom in setting the photographing cycle and schedule, enabling cultivation through more accurate image observation. Furthermore, when the recorded images are displayed, there are no images of unnecessary wells that do not contain cells, making it possible to perform efficient evaluations.
- FIG. 1 is a schematic configuration diagram of a culture device with a time lapse photography function according to an embodiment of the present invention.
- FIG. 2 is an enlarged view of the culture vessel of FIG. 1.
- FIG. 2 is a functional block diagram of the culture device with a time lapse photography function of FIG. 1.
- FIG. 1 is a diagram showing an example of a procedure for detecting the presence or absence of cells.
- FIG. 13 is a flow diagram showing a time lapse photography process using the culture device.
- 1A and 1B are diagrams showing examples of live image display of all wells, in which (A) shows a conventional display example, and (B) shows a display example of the present invention.
- FIG. 1A and 1B are diagrams showing examples of a timeline display of multiple wells, in which (A) shows a conventional display example, and (B) shows a display example of the present invention.
- FIG. 13 is a diagram showing a comparative example in which a moving image is displayed by frame-by-frame advancement of a plurality of time-lapse images.
- FIG. 13 is a diagram showing an example of an abnormality notification display.
- FIG. 1 is a schematic diagram of a culture device with a time-lapse photography function according to an embodiment of the present invention
- FIG. 2 is an enlarged view of the culture vessel in FIG. 1
- FIG. 3 is a functional block diagram of the culture device with a time-lapse photography function in FIG. 1.
- a culture device with a time lapse photography function (hereinafter sometimes simply referred to as a "culture device") 1 in an embodiment of the present invention is a culture device that arranges cells in each well 11 of a culture vessel 10 having at least one well 11 (see Figure 2) in a chamber section 2, cultures the cells in each well 11, and performs time lapse photography using a photography section 3.
- Time lapse photography is a photography method in which multiple still images are taken at regular time intervals (time lapse period) and these multiple still images are stitched together to create a video.
- the culture device 1 also has a culture control unit 4 that controls the chamber unit 2, an imaging control unit 5 that controls the imaging unit 3, a recording unit 6 that stores images captured by the imaging unit 3, an input/display unit 7 that inputs instructions for the operation of the device and displays images, and an overall control unit 8 that controls the entire device.
- a culture control unit 4 that controls the chamber unit 2
- an imaging control unit 5 that controls the imaging unit 3
- a recording unit 6 that stores images captured by the imaging unit 3
- an input/display unit 7 that inputs instructions for the operation of the device and displays images
- an overall control unit 8 that controls the entire device.
- the chamber section 2 maintains the environment, such as the temperature and CO2 / O2 gas concentration, required for cell culture.
- One or more culture vessels 10 can be stored in the chamber section 2.
- a heater, a CO2 gas flow path, and an O2 gas flow path (not shown) are connected to the chamber section 2.
- the culture control unit 4 controls the heater and the CO2 / O2 gas flow rate so that the temperature and the CO2 / O2 gas concentration are constant.
- the chamber section 2 may be configured with a plurality of chambers divided into one or more culture vessels.
- the photographing unit 3 is composed of a camera 30, an illumination 31, an objective lens 32, a movable part 33, etc.
- the illumination 31 shines light on the cells in the culture vessel 10
- the transmitted light and diffracted light are received by the objective lens 32
- the image enlarged by the objective lens 32 is input to the camera 30.
- the movable part 33 moves the camera 30 and the illumination 31 together in the arrangement direction of the wells of the culture vessel 10 (X and Y directions in FIG. 2).
- the movable part 33 also moves the objective lens 32 in the Z-axis (optical axis) direction to photograph the cells in the multiple culture vessels 10. Note that a configuration in which multiple cameras 30 and illuminations 31 are arranged for each culture vessel 10 and chamber part 2 can also be used.
- the camera 30 and illumination 31 can be fixed, and the chamber part 2 can be integrated with a separately provided movable part (not shown), and the culture vessel 10 can be moved in the X, Y, and Z directions. Furthermore, the camera 30 and the lighting 31 can be fixed, while both the chamber section 2 and the culture vessel 10 can be made movable.
- the imaging control unit 5 controls the optical settings of the imaging unit 3 when capturing images, position control, time lapse imaging conditions, and image storage.
- the imaging control unit 5 has an imaging means 40 that captures images for each well 11 of the culture vessel 10 at a predetermined time lapse imaging period, a detection means 41 that detects the presence or absence of cells in each well 11 of the culture vessel 10, and an image recording means 42 that records images of wells 11 that are detected as having cells by the detection means 41 from among the images captured for each well 11 by the imaging means 40.
- the imaging means 40 images each well 11 of the culture vessel 10 using the imaging unit 3 at a predetermined time lapse period that has been set in advance.
- the time lapse period can be set arbitrarily between several minutes and several hours.
- the imaging unit 3 is a microscope camera that is composed of, for example, an objective lens with a magnification of about 10x, a CCD or CMOS image sensor, etc.
- the detection means 41 detects the presence or absence of cells by analyzing the images captured by the imaging means 40 for each well. Detection of the presence or absence of cells is performed on a well-by-well basis.
- Figure 4 shows an example of a procedure for detecting the presence or absence of cells.
- the detection means 41 detects wells from the images of the wells captured by the imaging means 40, produces an image of only embryos as cells, and detects the presence or absence of an embryo from this image of only the embryo. Detection of the presence or absence of an embryo from an image of only the embryo can be performed by methods using image processing, artificial intelligence (machine learning, deep learning, etc.).
- Embryo images have the following characteristics, and the presence or absence of an embryo can be detected by focusing on one of these characteristics or a combination of multiple characteristics from the object.
- - It is circular.
- - Its size is between 100 and 200 ⁇ m.
- - There is a ring-shaped transparent body at the edge (almost uniform brightness area in the image).
- a method may be used in which detection is performed using deep learning or other methods that use various image characteristics, such as the brightness and darkness characteristics of the entire image, extraction of feature points, or model comparison.
- the image recording means 42 records in the recording unit 6 only the images of wells that are detected as having cells by the detection means 41, among the images captured for each well by the imaging means 40.
- the recording unit 6 is, for example, a recording medium such as a magnetic disk such as a hard disk drive (HDD) or a floppy disk (FD), an optical disk such as a compact disk (CD) or a DVD, a magneto-optical disk such as an MO, a solid state drive (SSD), a flash memory such as a memory card or a USB memory, or a magnetic tape. It is also possible to use a recording medium such as a network attached storage (NAS) or cloud storage as the recording unit 6.
- NAS network attached storage
- the timing for detecting the presence or absence of cells by the detection means 41 can be when time lapse photography starts, during time lapse photography, or both, but it is preferable to detect the presence or absence of cells for each time lapse cycle. This allows the presence or absence of cells to be detected each time photography is performed at a predetermined time lapse cycle, and only images of wells that are detected as having cells are recorded in the image recording means 42, so that only images of a minimum number of wells are recorded in the image recording means 42.
- the input/display unit 7 is composed of a display device with a touch panel, etc.
- the input/display unit 7 provides input instructions from the user to the culture control unit 4 and the photography control unit 5, and also displays images captured by the camera 30 and images read from the recording unit 6.
- the overall control unit 8 controls the various blocks within the device and the entire device.
- the overall control unit 8 also has an interface with the outside of the device.
- the overall control unit 8 may also be equipped with software for observing and evaluating embryos. This allows the overall control unit 8 to assist the user in their culture evaluation work by clearly arranging images on the input/display unit 7 and analyzing and displaying them.
- Figure 5 is a flow diagram showing the time-lapse photography process using the culture device 1.
- step (S106) If an embryo is present in the well 11, the imaging means 40 moves back and forth from the Z-axis focal position to capture multiple slice images of the well 11. However, if slice images are not required, it is sufficient to only capture images at the center of the focal point.
- the image recording means 42 stores the image of the well 11 in the recording unit 6.
- step (S108) It is determined whether or not photography has been completed for all wells 11. If photography has not been completed, the process proceeds to step (S103) to photograph the next well 11.
- step (S109) When photography of all wells 11 is completed, the process ends.
- step (S110) In time lapse photography from the second cycle onwards of the time lapse period, processing is carried out from step (S102).
- the wells 11 are detected first, and then the cells are detected.
- the regularity of the well arrangement is used to directly search for cells and detect the presence or absence of cells.
- step (S101) involves detecting the X, Y, and Z coordinates of all wells 11, it is also possible to take multiple divided images of multiple wells 11 across the entire culture vessel 10 and tile these images, or to use a high-resolution camera to take a wide-area image of all wells 11 in a single image, and then divide the image to extract the individual well images to detect the presence or absence of cells.
- the culture device 1 in this embodiment can be configured such that the imaging control unit 5 has a history recording means 43 that records the history of the presence or absence of cells in all wells 11 of the culture container 10 for each time lapse imaging period, and a notification means 44 that notifies when the detection result by the detection means 41 differs from the previous detection result.
- the imaging control unit 5 has a history recording means 43 that records the history of the presence or absence of cells in all wells 11 of the culture container 10 for each time lapse imaging period, and a notification means 44 that notifies when the detection result by the detection means 41 differs from the previous detection result.
- the history recording means 43 records the history of the presence or absence of cells in all wells 11 of the culture vessel 10 in the recording unit 6 for each time lapse photography cycle based on the detection results by the detection means 41. As a result, the history of the presence or absence of cells in all wells 11 of the culture vessel 10 is recorded by the history recording means 43 for each time lapse photography cycle, and it becomes possible to utilize the history of the presence or absence of cells in all wells 11 of the culture vessel 10 for each time lapse photography cycle for image arrangement in a timeline display and history management.
- FIG. 6 shows an example of live image display of all wells
- (A) shows a conventional display example
- (B) shows a display example of the present invention.
- FIG. 6(A) conventionally, images of all wells 11 of the culture vessel 10 are recorded, and images of all wells 11 are displayed regardless of the presence or absence of an embryo in each well 11.
- the present invention only images of wells 11 with embryos among all wells 11 of the culture vessel 10 are recorded in the recording unit 6, and the history of the presence or absence of embryos in all wells 11 is also recorded by the history recording means 43. Based on this history of the presence or absence of embryos, it is possible to display only images of wells 11 with embryos and not display wells 11 without embryos, as shown in FIG.
- FIG. 7 shows an example of a timeline display of multiple wells, (A) showing a conventional display example, and (B) showing a display example of the present invention.
- multiple wells are arranged horizontally, and images of the wells for each time lapse period are arranged vertically.
- embryos may be removed from wells 11 during the culture process for cryopreservation or transplantation.
- the culture vessel (dish) 10 may be taken out for external microscopic observation or culture medium change.
- FIG. 7(A) wells 11 from which embryos were removed are all displayed.
- FIG. 8 is a diagram showing a comparative example in which a video is displayed by frame-by-frame advancement of multiple time-lapse images.
- time-lapse image data of a specific embryo was read from a storage device and displayed continuously, resulting in the presence of images 81 of wells without cells.
- images 81 of wells without cells As a result, when the video is displayed, an image without an embryo appears for a moment, resulting in a discontinuous and difficult-to-view video display.
- this image 81 of only wells without an embryo is eliminated, resulting in a video that is easy to view and free of discontinuities.
- the growth state of cells can be visualized continuously by continuously displaying time-lapse images, and the process of change and growth can be easily understood.
- the notification means 44 notifies the user when the detection result by the detection means 41 is different from the previous detection result.
- the notification means 44 may, for example, sound a notification buzzer, turn on a notification lamp, or display an abnormality notification on the display.
- FIG. 9 shows an example of an abnormality notification display.
- the notification means 44 may, for example, display an abnormality notification dialog on the display as shown in FIG. 9 to alert the user of the culture device 1 and ask the user to confirm whether or not imaging is required.
- the imaging operation of the corresponding well 11 is put into a standby state, and if the operator has confirmed the presence or absence of an embryo through cryopreservation or transplantation, the operator may select "OK", or if there is a possibility of an error in the judgment, the operator may select "CANCEL" and instruct the user to take another image.
- the detection result of the presence or absence of cells may be notified to the user, and the user may be notified of the need to confirm the need to take an image or of an abnormality in the dish installation.
- the culture device 1 of this embodiment it is possible to automatically record only images of wells 11 in which cells are present for each well 11 of the culture container 10, thereby reducing the amount of usage of the recording unit 6 that records images.
- images of unnecessary wells 11 in which no cells are present are not recorded, there is more freedom in setting the shooting cycle and schedule, making it possible to culture with more accurate image observation.
- efficient evaluation can be performed.
- the present invention is useful as a culture device and culture method with a time-lapse photography function that cultures cells such as embryos and performs time-lapse photography.
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Abstract
Description
・円形状である
・サイズが100~200μmである
・輪郭に環状の透明体がある(画像でほぼ均一の輝度域)
・内部に構造体(テクスチャー)を有する
(S101)培養容器10内に設けられたマークなどにより全ウェル11のXY座標およびZ軸焦点中心の自動検出(オートフォーカス)がなされる。
(S102)撮影手段40は撮影部3を最初のウェル11へ移動する。
(S103)撮影手段40は撮影部3によりウェル11を撮影する。検出手段41は撮影手段40により撮影した画像からウェル11を検出する。
(S104)検出手段41はウェル11内の胚の有無を自動検出する。
(S105)検出手段41は胚の有無を判断する。ウェル11内に胚が無い場合、ステップ(S108)へ移行する。
(S106)ウェル11内に胚が有る場合、撮影手段40はZ軸焦点位置から前後にずらしてウェル11の複数のスライス画像を撮影する。但し、スライス画像が不要な場合は、焦点中心の撮影だけでも良い。
(S107)画像記録手段42はウェル11の画像を記録部6に保存する。
(S108)全ウェル11について撮影が完了したか否か判断する。撮影が完了していない場合、次のウェル11を撮影するため、ステップ(S103)へ移行する。
(S109)全ウェル11について撮影が完了すると処理を終了する。
(S110)タイムラプス周期の2周期目以降のタイムラプス撮影では、ステップ(S102)から処理を行う。
2 チャンバ部
3 撮影部
4 培養制御部
5 撮影制御部
6 記録部
7 入力/表示部
8 全体制御部
10 培養容器
11 ウェル
30 カメラ
31 照明
32 対物レンズ
33 可動部
40 撮影手段
41 検出手段
42 画像記録手段
43 経歴記録手段
44 通知手段
Claims (6)
- 少なくとも1個以上のウェルを有する培養容器のウェル毎に細胞を配して培養するとともにタイムラプス撮影を行うタイムラプス撮影機能付き培養装置であって、
前記培養容器のウェル毎に所定のタイムラプス撮影周期で撮影する撮影手段と、
前記培養容器のウェル毎に細胞の有無を検出する検出手段と、
前記撮影手段によりウェル毎に撮影した画像のうち前記検出手段により細胞有りと検出されたウェルの画像を記録する画像記録手段と
を含むタイムラプス撮影機能付き培養装置。 - 前記検出手段は、前記撮影手段によりウェル毎に撮影した画像を解析することにより前記細胞の有無を検出するものである請求項1記載のタイムラプス撮影機能付き培養装置。
- 前記検出手段は、前記タイムラプス撮影周期毎に細胞の有無を検出するものである請求項1または2に記載のタイムラプス撮影機能付き培養装置。
- 前記検出手段による検出結果が前回の検出結果と異なる場合に通知する通知手段を有する請求項1または2に記載のタイムラプス撮影機能付き培養装置。
- 前記タイムラプス撮影周期毎に前記培養容器の全ウェルの細胞の有無経歴を記録する経歴記録手段を有する請求項1または2に記載のタイムラプス撮影機能付き培養装置。
- 少なくとも1個以上のウェルを有する培養容器のウェル毎に細胞を配して培養するとともにタイムラプス撮影を行う培養方法であって、
前記培養容器のウェル毎に所定のタイムラプス撮影周期で撮影すること、
前記培養容器のウェル毎に細胞の有無を検出すること、
前記ウェル毎に撮影した画像のうち細胞有りと検出されたウェルの画像を記録すること
を含む培養方法。
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| EP23874859.4A EP4600341A1 (en) | 2022-10-05 | 2023-10-03 | Culture device having time-lapse imaging function, and culture method |
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| AU2023357663A1 (en) | 2025-05-22 |
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