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US 2001/0043067 A1Published application
MR imaging method and MRI apparatus
AssigneeGE Medical Systems Global Technology Company, LLC
InventorsNozomu Uetake, Susumu Kosugi
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AssigneeGE Medical Systems Global Technology Company, LLC
InventorsNozomu Uetake, Susumu Kosugi
Estimating the term…
With an intention to improve picture quality without increasing the overall number of times of data collection and to restrain artifacts resulting from differences in noise structure between parts differing in the number of times of addition, the total number V of views is equally divided into eight, and the areas of the two ends of each V/8, where the absolute value of the quantity of phase encoding is the greatest, are reduced in the number of times of addition by ½ of the reference number of times N, because their contributions to picture quality is small. The remaining middle 6V/8 areas are increased in the number of times of addition by ½ of the reference number of times N, because their contributions to picture quality are great, and further to alleviate the non-continuity of the variations of the number of times of addition, the number of times of addition in the middle 6V/8 areas is varied so as to follow either a Hamming function or a Hanning function.
An MR imaging method whereby k spaces are configured out of views from the first view, where the quantity of phase encoding takes on the largest negative (or positive) value, through a Vth view, where the quantity of phase encoding takes on the largest positive (or negative) value, and data An resulting from arithmetic averaging as the data of the nth view resulting from repeated collection of data by Xn times of addition in an nth (n=1˜V) view are used for image reconfiguration, wherein the number of times of addition Xn is varied to become greater as the absolute value of the quantity of phase encoding decreases and to cause all or part of it to follow either a Hamming function or a Hanning function.
An MR imaging method whereby k spaces are configured out of views from the first view, where the quantity of phase encoding takes on the largest negative (or positive) value, through a Vth view, where the quantity of phase encoding takes on the largest positive (or negative) value, and data An resulting from arithmetic averaging as the data of the nth view resulting from repeated collection of data by Xn times of addition in an nth (n=1˜V) view are used for image reconfiguration, wherein, where the reference number of times of addition is N:
An MR imaging method whereby k spaces are configured out of views from the first view, where the quantity of phase encoding takes on the largest negative (or positive) value, through a Vth view, where the quantity of phase encoding takes on the largest positive (or negative) value, and data An resulting from arithmetic averaging as the data of the nth view resulting from repeated collection of data by Xn times of addition in an nth (n−1˜V) view are used for image reconfiguration, wherein, where the reference number of times of addition is N:
An MRI apparatus comprising an RF pulse transmitting means, a slope pulse applying means and an NMR signal receiving means, wherein those means are controlled so as to use for image reconfiguration data An resulting from repeated collection by Xn times of addition and the arithmetic averaging of data in an nth view (n=1˜V) of k spaces configured out of views from the first view, where the quantity of phase encoding takes on the largest negative (or positive) value, through a Vth view, where the quantity of phase encoding takes on the largest positive (or negative) value, wherein it is further provided with a determination means for the number of times of addition to vary the number of times of addition Xn to become greater as the absolute value of the quantity of phase encoding decreases and to cause all or part of it to follow either a Hamming function or a Hanning function.
An MRI apparatus comprising an RF pulse transmitting means, a slope pulse applying means and an NMR signal receiving means, wherein those means are controlled so as to use for image reconfiguration data An resulting from repeated collection by Xn times of addition and the arithmetic averaging of data in an nth view (n=1˜V) of k spaces configured out of views from the first view, where the quantity of phase encoding takes on the largest negative (or positive) value, through a Vth view, where the quantity of phase encoding takes on the largest positive (or negative) value, wherein it is further provided with a determination means for the number of times of addition to perform, where the reference number of times of addition is N, addition (N−N/2) times from the first view till the (V/8)-th view;
An MRI apparatus comprising an RF pulse transmitting means, a slope pulse applying means and an NMR signal receiving means, wherein those means are controlled so as to use for image reconfiguration data An resulting from repeated collection by Xn times of addition and the arithmetic averaging of data in an nth view (n=1˜V) of k spaces configured out of views from the first view, where the quantity of phase encoding takes on the largest negative (or positive) value, through a Vth view, where the quantity of phase encoding takes on the largest positive (or negative) value, wherein it is further provided with a determination means for the number of times of addition to perform, where the reference number of times of addition is N, addition (N−N/2) times from the first view till the (V/8)-th view;
Dependencies are inferred from the claim text.