MRI SYSTEM WITH MEANS TO ELIMINATE OBJECT MOVEMENT WHILST ACQUIRING ITS IMAGE
First Claim
Patent Images
1. A method for reducing the effect of object movements along MRI imaging;
- the method comprising steps of;
a. acquiring a sequence of N MRI consecutive images CIn of an object;
b. storing on a computer readable medium (CRM) for each of said CIn;
at least one parameter p indicating spatial image orientation at which said image was taken;
c. analyzing said sequence of said CIn for detection of said object movement; and
tagging thereby KM images CIkM of at least one movement M of said object;
d. for each of said movement M, determining the following using said tagged images CIkM;
a. two of the following;
the movement starting time TMS, the movement ending time TME, and time length of said movement TM;
b. the movement spatial image orientation parameter PMS at the beginning of the movement,wherein said method additionally comprising for each said M, whose TM is shorter from a predetermined time length PT, steps ofe. acquiring a sequence of KM MRI consecutive images NCIkM starting at said PMS; and
ending after said TM;
f. replacing said NCIkM with said CIkM in said sequence;
g. repeating steps (c)-(f) until no more movements whose TM is shorter than said PT can be detected;
thereby, producing an image sequence with reduced object-movement in MRI imaging.
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Abstract
A method of reducing the effect of object movements along MRI imaging. The method includes: acquiring a sequence of MRI consecutive images of an object; storing on a computer readable medium, for each of the images, at least one parameter p indicating spatial image orientation at which the image was taken; analyzing the sequence of the images for detection of the object movement; and tagging images of at least one movement of the object.
78 Citations
26 Claims
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1. A method for reducing the effect of object movements along MRI imaging;
- the method comprising steps of;
a. acquiring a sequence of N MRI consecutive images CIn of an object; b. storing on a computer readable medium (CRM) for each of said CIn;
at least one parameter p indicating spatial image orientation at which said image was taken;c. analyzing said sequence of said CIn for detection of said object movement; and
tagging thereby KM images CIkM of at least one movement M of said object;d. for each of said movement M, determining the following using said tagged images CIkM; a. two of the following;
the movement starting time TMS, the movement ending time TME, and time length of said movement TM;b. the movement spatial image orientation parameter PMS at the beginning of the movement, wherein said method additionally comprising for each said M, whose TM is shorter from a predetermined time length PT, steps of e. acquiring a sequence of KM MRI consecutive images NCIkM starting at said PMS; and
ending after said TM;f. replacing said NCIkM with said CIkM in said sequence; g. repeating steps (c)-(f) until no more movements whose TM is shorter than said PT can be detected; thereby, producing an image sequence with reduced object-movement in MRI imaging. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
- the method comprising steps of;
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2. A method for reducing the effect of object movements along MRI imaging;
- the method comprising steps of;
a. acquiring a sequence of N MRI consecutive images CIn of an object; b. storing on a computer readable medium (CRM) for each of said CIn;
at least one parameter p indicating spatial image orientation at which said image was taken;c. by means of one or more non-MRI motion detectors, analyzing motion of said object and tagging thereby KM images CIkM of at least one movement M of said object; d. for each of said movement M, determining the following using said tagged images CIkM; a. two of the following;
the movement starting time TMS, the movement ending time TME, and time length of said movement TM;b. the movement spatial image orientation parameter PMS at the beginning of the movement, wherein said method additionally comprising for each said M, whose TM is shorter from a predetermined time length PT, steps of e. acquiring a sequence of KM MRI consecutive images NCIkM starting at said PMS; and
ending after said TM;f. replacing said NCIkM with said CIkM in said sequence; g. repeating steps (c)-(f) until no more movements whose TM is shorter than said PT can be detected; thereby, producing an image sequence with reduced object-movement in MRI imaging. - View Dependent Claims (3, 21, 22, 23, 24, 25, 26)
- the method comprising steps of;
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11. An MRI system imaging a movable object comprising:
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a. an MRI device adapted to take a sequence of N MRI consecutive images CIn of an object;
each of said images is characterized by at least one parameter p indicating spatial image orientation at which said image was taken;b. a computer readable medium (CRM) in communication with said MRI;
said CRM having instructions thereon for executing a method comprising steps of;i. analyzing said sequence of said CIn; and
tagging thereby KM images CIkM of at least one movement M of said object;ii. for each of said movement M, determining the following using said tagged images CIkM;
(a) two of the following;
the movement starting time TMS, the movement ending time TME, and time length of said movement TM; and
(b) the movement spatial image orientation parameter PMS at the beginning of the movement;wherein for each said M, whose TM is shorter from a predetermined time length PT, said instructions are additionally adapted for iii. acquiring a sequence of KM MRI consecutive images NCIkM starting at said PMS; and
ending after said TM;iv. replacing said NCIkM with said CIkM in said sequence; v. repeating steps (i)-(iv) until no more movements whose TM is shorter from said PT can be detected. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification