title: Validity of 99mTc-DMSA renal uptake by planar posterior-view method in children.
abstract: Renal uptake of 99mTc-DMSA has been quantified by various methods. The aim of this study is to obtain a normal value for 99mTc-DMSA renal uptake calculated by the posterior view method and age variation, and to assess its clinical validity. Scintigrams of 238 children (0-12 years) with 99mTc-DMSA were reviewed. All the children had a clinical history of primary vesicoureteral reflux and/or neurogenic bladder, ureteral or urethral anomalies. Their kidneys were divided into two groups, "normal" and "abnormal" according to their scintigraphic findings and split renal functions. Percent renal uptake per injected dose (% RU) was quantitated from planar images at 2 hours after injection of an age-adjusted dose (26-95 MBq) of 99mTc-DMSA. Calculated total % RU, individual % RU of the right and left kidneys (mean +/- sd) in patients with normal kidneys were 40.7 +/- 5.0%, 20.2 +/- 3.0%, 20.4 +/- 2.7%, respectively. There was no significant correlation between % RU and age (r = 0.231). Longitudinal variation in the % RU in 9 patients ranged from 1.2% to 18%. Our conventional method for quantifyng % RU is simple, practical and feasible in routine clinical practice, especially for children under follow up.
authors.affiliation: Department of Nuclear Medicine, Hokkaido University School of Medicine, Sapporo, Japan. ertsuka@med.hokudai.ac.jp
authors.forename: E
authors.initials: E
authors.lastname: Tsukamoto
authors.forename: K
authors.initials: K
authors.lastname: Itoh
authors.forename: C
authors.initials: C
authors.lastname: Katoh
authors.forename: T
authors.initials: T
authors.lastname: Mochizuki
authors.forename: T
authors.initials: T
authors.lastname: Shiga
authors.forename: K
authors.initials: K
authors.lastname: Morita
authors.forename: N
authors.initials: N
authors.lastname: Tamaki
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007668:Kidney / Q000000981:diagnostic imaging* / Q000378:metabolism; D008297:Male; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics*; D019783:Technetium Tc 99m Dimercaptosuccinic Acid / Q000493:pharmacokinetics*; D014018:Tissue Distribution; D015899:Tomography, Emission-Computed, Single-Photon; D014513:Ureter / Q000002:abnormalities; D014521:Urethra / Q000002:abnormalities; D001750:Urinary Bladder, Neurogenic / Q000000981:diagnostic imaging*; D014718:Vesico-Ureteral Reflux / Q000000981:diagnostic imaging*
chemical_list: D019275:Radiopharmaceuticals; D019783:Technetium Tc 99m Dimercaptosuccinic Acid