Magnetic resonance imaging apparatus and method

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid by using collected data, wherein
• the processing circuitry collects data in a low frequency region of a k-space over a plurality of time phases within one respiratory cycle and collects data in a high frequency region of the k-space over the time phases within one respiratory cycle;
• and
• the processing circuitry generates the images of the time phases by combining the data in the low frequency region and the data in the high frequency region.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid by using collected data, wherein
• the processing circuitry collects data of the entire k-space for one time phase within one respiratory cycle and collects data in a low frequency region of the k-space over the time phases within one respiratory cycle;
• and
• the processing circuitry generates the images of the time phases by combining data in a high frequency region among whole data for one time phase with the data in the low frequency region in each time phase.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid by using collected data, wherein
• the processing circuitry collects data in a low frequency region of a k-space over a plurality of time phases within one respiratory cycle and collects data in a high frequency region of the k-space for one time phase within one respiratory cycle;
• and
• the processing circuitry generates the images of the time phases by combining the data in the low frequency region and the data in the high frequency region.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid by using collected data, wherein
• the processing circuitry collects the data of the imaging area by changing the number of segments and a time window width for collecting the data depending on a certain period in the respiratory cycle.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid by using collected data, wherein
• the processing circuitry collects data having a first size with a first time window width in a period of exhalation and a period of inhalation in one respiratory cycle, and collects data having a size smaller than the first size with a second time window width shorter than the first time window width in a transition period between exhalation and inhalation.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows under a task of respiration;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid by using collected data, wherein
• the processing circuitry inserts and applies the labeling pulse between pieces of data of different time phases when collecting part of the data of the imaging area divided into a plurality of segments over a plurality of time phases within one respiratory cycle.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid during a certain period in the respiratory cycle by using the collected data, wherein
• the processing circuitry continuously collects the data of the imaging area over the time phases and collects data indicating the time phase of the respiratory cycle;
• and
• the processing circuitry selectively generates the images of the time phases during a certain period in the respiratory cycle by using the continuously collected data of the imaging area and the data indicating the time phase of the respiratory cycle.

A magnetic resonance imaging apparatus comprising:

• processing circuitry configured to
• collect data of an imaging area over a plurality of time phases within a certain respiratory cycle after applying a labeling pulse to a labeling area in which cerebrospinal fluid flows;
• and
• generate images of a plurality of time phases depicting the cerebrospinal fluid during a certain period in the respiratory cycle by using the collected data, wherein
• the processing circuitry continuously collects the data of the imaging area over the time phases and collects data indicating the time phase of the respiratory cycle;
• and
• the processing circuitry selectively generates the images of the time phases in at least one of a period in which respiratory fluctuation is large, a period of exhalation, and a period of inhalation in the respiratory cycle by using the continuously collected data of the imaging area and the data indicating the time phase of the respiratory cycle.