title: Optimizing renal DMSA-scintigraphy with 7-pinhole collimator.
abstract: Multiple pinhole emission tomographic imaging techniques are currently being applied to imaging of organs of a limited size. The purpose of this study was to evaluate the feasibility of this technique in kidney imaging with Tc99m-DMSA. A 7-pinhole collimator having 4.5 mm. pinhole apertures was used in conjunction with a widefield camera. Left and right kidney were imaged separately. Twelve small renal cysts with a diameter of 1 to 3.5 cm. verified by US or CAT were investigated by 7-pinhole and planar scintigraphy. Eight of 12 renal cysts were identified by 7-pinhole scintigraphy whereas only one cyst was seen by planar scintigraphy. The borderline of cysts detection was 1.5 cm. in 7-pinhole tomography. Basing on these comparative studies and experiences on many patient investigations it seems reasonable to perform renal scintigraphy with 7-pinhole tomography in a routine manner.
mesh_terms: D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging / Q000295:instrumentation*; D004113:Succimer; D013438:Sulfhydryl Compounds
chemical_list: D013438:Sulfhydryl Compounds; D004113:Succimer