System and method for magnetic resonance image acquisition
A system and method of acquiring an image at a magnetic resonance imaging (MRI) system is provided. Accordingly, an analog signal based on a pulse sequence and a first gain is obtained. The analog signal is converted into a digitized signal. A potential quantization error is detected in the digitized signal based on a boundary. When the detection is affirmative, a replacement analog signal based on the pulse sequence is received. At least one portion of the replacement analog signal can be based on an adjusted gain. The adjusted gain is a factor of the first gain. The replacement analog signal is digitized into a replacement digitized signal. At least one portion of the replacement digitized signal corresponding to the at least one portion of the replacement analog signal is adjusted based on a reversal of the factor.
1. A method of acquiring an image at a magnetic resonance imaging (MM) system comprising:
receiving raw data for the image, wherein the raw data is data corresponding to a k-space matrix for one of a plurality of slices of the image;
receiving at least one indication of an event occurring at a time period;
determining a portion of the raw data acquired at a portion of the time period; and
when the determining is affirmative, performing a scan to obtain replacement data for the determined portion of the raw data.
2. The method of claim 1 wherein the received raw data is at least one line of data along the frequency axis of the k-space matrix.
3. The method of claim 1 wherein the partial scan is performed at one of:
prior to receiving any additional raw data, and
after all of the raw data for the image is received.
4. The method of claim 2 , wherein at least one of said receiving raw data for the image and performing a scan to obtain replacement data occurs at the end of completing each k-space matrix for each slice of the image.
5. The method of claim 2 , wherein at least one of said receiving raw data for the image and performing a scan to obtain replacement data occurs at the end of completing all k-space matrices for all slices of the image.
6. The method of claim 1 , wherein said event is operation of a robotic apparatus and said portion of the time period comprises the operational time of the robotic apparatus.
7. The method of claim 1 , wherein said event comprises opening and closing of a door and said portion of the time period comprises the time during which said door opens and closes.
8. A magnetic resonance imaging (MM) system comprising a data processing system, a main field magnet, gradient coils and radio frequency coils, the MRI system configured to
receive raw data for the image, wherein the raw data is data corresponding to a k-space matrix for one of a plurality of slices of the image;
receive at least one indication of an event occurring at a time period;
determine a portion of the raw data acquired at a portion of the time period; and
when the determining is affirmative, perform a scan to obtain replacement data for the determined portion of the raw data.
9. A non-transient computer program product comprising computer executable instructions, the instructions, when executed by a computer, performing a method of acquiring an image at a magnetic resonance imaging (MRI) system comprising:
receiving raw data for the image, wherein the raw data is data corresponding to a k-space matrix for one of a plurality of slices of the image;
receiving at least one indication of an event occurring at a time period;
determining a portion of the raw data acquired at a portion of the time period; and
when the determining is affirmative, performing a scan to obtain replacement data for the determined portion of the raw data.