Question

y select correct statements * Body-contouring orbits for SPECT image acquisition improve image resolution compared with circular orbits. In continuous acquisition, data are collected over one or several sequential 360° rotations there is one pause Not all positron emitting isobars are produced in a cyclotron A 64 x 64 matrix may be used if the count density will be low.

Answer 1

• In continuous acquisition, data are collected over one or several sequential 360 rotations there is one pause
• Not all positron-emitting isobars are produced in a cyclotron

option b is correct as data are collected over one or several sequential 360 rotations and a pause is there for few seconds.

option c is correct as positron-emitting isobars are also produced by the decomposition of long durable radioactive parents that happen naturally.

option a is incorrect as body contour orbits for SPECT enlarge spatial resolution.

option d is incorrect as 128 x 128 matrix is used if count density is low.