Abstract: Embodiments of the present disclosure provide an image processing method, a system, an apparatus, and a storage medium thereof. The image processing method may include obtaining a phantom image and a normalization standard and performing a first processing on the phantom image. The method may also include generate a recovery coefficient of the processed phantom image generated by the first processing; determining whether the recovery coefficient satisfies the normalization standard and in response to determining that the recovery coefficient satisfies the normalization standard, obtaining a target processing parameter. The target processing parameter is a processing parameter of the first processing when the recovery coefficient satisfies the normalization standard. The method may further include determining an image processing result by processing an image to be processed based on the target processing parameter.

Abstract: The present disclosure provides methods and systems for lesion region identification. The methods may include identifying a target region corresponding to at least one reference organ from a first medical image of a target subject. The methods may include determining, based on the target region, a reference threshold used for lesion detection. The methods may further include identifying, based on the reference threshold, a lesion region from the first medical image.

Abstract: The present disclosure provides systems and methods for medical imaging. The system may obtain a scout image of a subject lying on a scanning table. The scanning table may include N portions corresponding to N bed positions of a target scan, and an ith portion of the N portions may correspond to an ith bed position of the N bed positions. For the ith bed position, the system may determine one or more body parts of the subject located at the ith portion of the scanning table based on the scout image; and determine at least one scanning parameter or reconstruction parameter corresponding to the ith bed position based on the one or more body parts of the subject.

Abstract: Provide a method, system, and medium for processing an image. The method comprises: obtaining a plurality of dynamic frame images, each of the plurality of dynamic frame images at least including dynamic image information of a target region; and determining the time-activity curve by processing the plurality of dynamic frame images.

Abstract: A method and system for calibrating a PET scanner are described. The PET scanner may have a field of view (FOV) and multiple detector rings. A detector ring may have multiple detector units. A line of response (LOR) connecting a first detector unit and a second detector unit of the PET scanner may be determined. The LOR may correlate to coincidence events resulting from annihilation of positrons emitted by a radiation source. A first time of flight (TOF) of the LOR may be calculated based on the coincidence events. The position of the radiation source may be determined. A second TOF of the LOR may be calculated based on the position of the radiation source. A time offset may be calculated based on the first TOF and the second TOF. The first detector unit and the second detector unit may be calibrated based on the time offset.

Abstract: A method and system for calibrating a PET scanner are described. The PET scanner may have a field of view (FOV) and multiple detector rings. A detector ring may have multiple detector units. A line of response (LOR) connecting a first detector unit and a second detector unit of the PET scanner may be determined. The LOR may correlate to coincidence events resulting from annihilation of positrons emitted by a radiation source. A first time of flight (TOF) of the LOR may be calculated based on the coincidence events. The position of the radiation source may be determined. A second TOF of the LOR may be calculated based on the position of the radiation source. A time offset may be calculated based on the first TOF and the second TOF. The first detector unit and the second detector unit may be calibrated based on the time offset.

Abstract: A system for medical imaging is provided. The system includes a scanning device configured with a scanning cavity, a control device, and an output device configured within the scanning cavity. The control device is configured to obtain one or more scan protocols and acquire at least one guide instruction corresponding to the one or more scan protocols. The output device is configured to obtain guide information corresponding to the at least one guide instruction and present the guide information. The scanning device is configured to scan a subject with the presentation of the guide information according to the one or more scan protocols.

Abstract: A method and system for calibrating a PET scanner are described. The PET scanner may have a field of view (FOV) and multiple detector rings. A detector ring may have multiple detector units. A line of response (LOR) connecting a first detector unit and a second detector unit of the PET scanner may be determined. The LOR may correlate to coincidence events resulting from annihilation of positrons emitted by a radiation source. A first time of flight (TOF) of the LOR may be calculated based on the coincidence events. The position of the radiation source may be determined. A second TOF of the LOR may be calculated based on the position of the radiation source. A time offset may be calculated based on the first TOF and the second TOF. The first detector unit and the second detector unit may be calibrated based on the time offset.

Abstract: A method and system for calibrating a PET scanner are described. The PET scanner may have a field of view (FOV) and multiple detector rings. A detector ring may have multiple detector units. A line of response (LOR) connecting a first detector unit and a second detector unit of the PET scanner may be determined. The LOR may correlate to coincidence events resulting from annihilation of positrons emitted by a radiation source. A first time of flight (TOF) of the LOR may be calculated based on the coincidence events. The position of the radiation source may be determined. A second TOF of the LOR may be calculated based on the position of the radiation source. A time offset may be calculated based on the first TOF and the second TOF. The first detector unit and the second detector unit may be calibrated based on the time offset.

Abstract: A system for medical imaging is provided. The system includes a scanning device configured with a scanning cavity, a control device, and an output device configured within the scanning cavity. The control device is configured to obtain one or more scan protocols and acquire at least one guide instruction corresponding to the one or more scan protocols. The output device is configured to obtain guide information corresponding to the at least one guide instruction and present the guide information. The scanning device is configured to scan a subject with the presentation of the guide information according to the one or more scan protocols.

Abstract: A method and system for calibrating a PET scanner are described. The PET scanner may have a field of view (FOV) and multiple detector rings. A detector ring may have multiple detector units. A line of response (LOR) connecting a first detector unit and a second detector unit of the PET scanner may be determined. The LOR may correlate to coincidence events resulting from annihilation of positrons emitted by a radiation source. A first time of flight (TOF) of the LOR may be calculated based on the coincidence events. The position of the radiation source may be determined. A second TOF of the LOR may be calculated based on the position of the radiation source. A time offset may be calculated based on the first TOF and the second TOF. The first detector unit and the second detector unit may be calibrated based on the time offset.