title: Quantitation of cerebral blood volume by 99mTc-DTPA-HSA SPECT.
abstract: The characteristics of technetium-99m diethylenetriaminepentaacetic acid human serum albumin (99mTc-DTPA-HSA) as an agent for quantitation of cerebral blood volume (CBV) were examined. The radioactivity after decay correction as a percentage of the activity at 10 minutes was 84.3 +/- 1.3% at 120 minutes after the injection of 99mTc-DTPA-HSA. Radioactivity was found exclusively in plasma, with little in blood cells. The blood retention of 99mTc-DTPA-HSA is sufficient, and its use in the quantitation of CBV omits the need for centrifugation of the blood sample. CBV quantified using the tracer and a SPECT system with a single-head rotating gamma camera was 4.09 +/- 0.60 ml/100 g brain, similar to values reported previously. Two serial SPECT scans provided similar images, and the CBV values determined by the two scans were closely correlated (p < 0.001). The high reproducibility suggests that the method may be used to monitor the cerebrovascular response to drugs. It was concluded that 99mTc-DTPA-HSA has useful properties for quantitative CBV measurement and that quantitation of CBV by 99mTc-DTPA-HSA SPECT is feasible using a system with a single-head rotating gamma camera.
authors.affiliation: Department of Radiology, Saitama Medical Center, Saitama Medical School, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Inoue
authors.forename: T
authors.initials: T
authors.lastname: Momose
authors.forename: K
authors.initials: K
authors.lastname: Machida
authors.forename: N
authors.initials: N
authors.lastname: Honda
authors.forename: T
authors.initials: T
authors.lastname: Mamiya
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Kamano
authors.forename: M
authors.initials: M
authors.lastname: Kinoshita
authors.forename: K
authors.initials: K
authors.lastname: Tsutsumi
authors.forename: T
authors.initials: T
authors.lastname: Asano
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001810:Blood Volume; D001921:Brain / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013668:Technetium Tc 99m Aggregated Albumin; D016284:Technetium Tc 99m Pentetate; D014055:Tomography, Emission-Computed; D015899:Tomography, Emission-Computed, Single-Photon; D014057:Tomography, X-Ray Computed
chemical_list: D013668:Technetium Tc 99m Aggregated Albumin; D016284:Technetium Tc 99m Pentetate