Variability in PET image quality and quantification measured with a permanently filled Ge-phantom: a multi-center study.

Background: This study evaluated, as a snapshot, the variability in quantification and image quality (IQ) of the clinically utilized PET [F]FDG whole-body protocols in Finland using a NEMA/IEC IQ phantom permanently filled with Ge.

Methods: The phantom was imaged on 14 PET-CT scanners, including a variety of models from two major vendors. The variability of the recovery coefficients (RC, RC and RC) of the hot spheres as well as percent background variability (PBV), coefficient of variation of the background (COV) and accuracy of corrections (AOC) were studied using images from clinical and standardized protocols with 20 repeated measurements.

A Nordic survey of CT doses in hybrid PET/CT and SPECT/CT examinations.

Background: Computed tomography (CT) scans are routinely performed in positron emission tomography (PET) and single photon emission computed tomography (SPECT) examinations globally, yet few surveys have been conducted to gather national diagnostic reference level (NDRL) data for CT radiation doses in positron emission tomography/computed tomography (PET/CT) and single photon emission computed tomography/computed tomography (SPECT/CT). In this first Nordic-wide study of CT doses in hybrid imaging, Nordic NDRL CT doses are suggested for PET/CT and SPECT/CT examinations specific to the clinical purpose of CT, and the scope for optimisation is evaluated. Data on hybrid imaging CT exposures and clinical purpose of CT were gathered for 5 PET/CT and 8 SPECT/CT examinations via designed booklet.

Tc-Sestamibi/I Subtraction SPECT/CT in Parathyroid Scintigraphy: Is Additional Pinhole Imaging Useful?

Objectives: This retrospective study evaluated whether the use of additional anterior Tc-sestamibi/I pinhole imaging improves the outcome of Tc-sestamibi/I subtraction SPECT/CT in parathyroid scintigraphy (PS).

Materials And Methods: PS using simultaneous dual-isotope subtraction methods and an acquisition protocol combining SPECT/CT and planar pinhole imaging was performed for 175 patients with primary or secondary hyperparathyroidism. All patients who proceeded to surgery with complete postsurgery laboratory findings were included in this study ( = 94).

Comparison of five parathyroid scintigraphic protocols.

Objectives. We compared five parathyroid scintigraphy protocols in patients with primary (pHPT) and secondary hyperparathyroidism (sHPT) and studied the interobserver agreement. The dual-tracer method ((99m)Tc-sestamibi/(123)I) was used with three acquisition techniques (parallel-hole planar, pinhole planar, and SPECT/CT).

Parathyroid scintigraphy protocols in Finland in 2010. Results of the query and current status.

Unlabelled: The GOAL of this study was to describe current clinical parathyroid scintigraphy (PS) protocols in Finland.

Methods: all departments of nuclear medicine in Finland were contacted, and instructions regarding PS were requested.

Results: instructions regarding PS were received from all of the departments that perform PS (n = 19).