|
|
performance assessment of a channel multi-pinhole collimator for myocardial perfusion imaging with spect: a monte carlo simulation
|
|
|
|
|
نویسنده
|
mohebbi z. ,saeedzadeh e. ,mahani h.
|
منبع
|
journal of nuclear research and applications - 2023 - دوره : 3 - شماره : 3 - صفحه:18 -22
|
چکیده
|
While conventional parallel-hole collimators are widely used in myocardial perfusion imaging (mpi) with spect, they are suboptimal in balancing the existing sensitivity-resolution compromise. therefore, multi-pinhole collimation has been proposed to address the problem. in the present study, a channel multi-pinhole collimated spect scanner is modeled and then simulated using the gate monte carlo simulation. the multi-pinhole collimator comprises eight apertures. the material, diameter, and height of the apertures were assumed to be varying. a comparison with conventional single-pinhole was also conducted. the results show that increasing the hole diameter leads to degraded spatial resolution for the multi-pinhole collimator. compared to the single-pinhole, the multi-pinhole collimators suffer from projection overlapping and thus deteriorated spatial resolution. the findings confirm that the channel multi-pinhole collimators outperform the single-pinhole apertures by providing much higher sensitivity at the expense of slightly lower spatial resolution and therefore would be the collimator of choice for mpi with spect.
|
کلیدواژه
|
spect ,monte carlo ,gate ,mpi ,multi-pinhole
|
آدرس
|
islamic azad university, science and research branch, department of radiation medical engineering, iran, islamic azad university, science and research branch, department of radiation medical engineering, iran, nuclear science and technology research institute, radiation applications research school, iran
|
پست الکترونیکی
|
hmahani@aeoi.org.ir
|
|
|
|
|
|
|
|
|
|
|
|
Authors
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|