BREATH-HOLD DETECTION FOR MAGNETIC RESONANCE IMAGING

摘要

The present invention provides a method for magnetic resonance (MR) imaging of an area (144) of a subject of interest (120), comprising the steps of issuing a breath-hold command to the subject of interest (120), performing motion detection of the subject of interest (120) to detect a breath-hold condition in the area (144) of the subject of interest (120), upon detection of the breath-hold condition in the area (144) of the subject of interest (120), performing k-space (154) sampling of the area (144) of the subject of interest (120) with a given resolution, processing the k-space (154) samples covering the area (144) of the subject of interest (120) to obtain a MR image of the area (144) of the subject of interest (120). The present invention also provides a MR imaging system (110) for providing an image representation of an area (144) of a subject of interest (120) positioned in an examination space (116) of the MR imaging system (110), wherein the MR imaging system (110) is adapted to perform the method for magnetic resonance imaging according to the above method.

主权项

1. A method for magnetic resonance (MR) imaging of an area of a subject of interest, comprising
issuing a breath-hold command to the subject of interest, performing motion detection of the subject of interest to detect a breath-hold condition in an area of the subject of interest, performing k-space sampling of the area of the subject of interest to acquire a first subset of k-space samples from the set of k-space samples covering the area of the subject of interest prior to detection of the breath-hold condition in the area of the subject of interest, upon detection of the breath-hold condition in the area of the subject of interest, performing k-space sampling of the area of the subject of interest with a given resolution, comprising performing k-space sampling to acquire a second subset of k-space samples covering the area of the subject of interest, processing the k-space samples covering the area of the subject of interest to obtain a MR image of the area of the subject of interest comprising processing the first and second subset of k-space samples to obtain the MR image of the area of the subject of interest, wherein the first and the second subset of k-space samples together cover the area of the subject of interest with the given resolution, and the step of performing motion detection of the subject of interest to detect a breath-hold condition in the area of the subject of interest is performed at least partially during the acquisition of the first and/or second subset of k-space samples, wherein the step of processing the k-space samples covering the area of the subject of interest to obtain a MR image of the area of the subject of interest further comprises rejecting and/or weighing k-space samples from the first and/or the second subset of k-space samples depending on the detected motion of the area of the subject of interest.