UNLABELLED This study investigated the feasibility of quantitative accuracy and harmonized image quality in (89)Zr-PET/CT multicenter studies. METHODS Five PET/CT scanners from 3 vendors were included. (89)Zr activity was measured in a central dose calibrator before delivery. Local activity assays were based on volume as well as on the local dose calibrator. Accuracy and image noise were dete...

Two different dose calibrators were studied and their performance measured using the following tests: (A) linearity of response over all activity ranges, (B) accuracy when measuring some commonly used radionuclides, (C) the effect of container configuration on the accuracy of measurement, and (D) daily and long-term stability of the instrument. For each instrument tested, a good linear response...

Objectives: The goals of this investigation are to determine whether commercially available dose calibrators can be used to measure the activity of -emitting radionuclides used in pain palliation and to establish whether manufacturer-supplied calibration factors are appropriate for this purpose. Methods: Six types of commercially available dose calibrators were studied. Dose calibrator response...

Radiation dose measurements of radiopharmaceuticals and calibrators at different voltages fluctuations were evaluated. Low high doses technetium, iodine fluorine pharmaceuticals measured in voltages. The results showed that only low could make small insignificant differences.

Because of their chemical properties and multiday half lives, iodine-124 and zirconium-89 are being used in a growing number of PET imaging studies. Some aspects of their quantitation, however, still need attention. For (89)Zr the PET images should, in principle, be as quantitatively accurate as similarly reconstructed 18F measurements. We found, however, that images of a 20 cm well calibration...

Nuclear Regulatory Commission (NRC) guidelines state that dose calibrators must be tested for linearity upon installation and quarterly thereafter over a range of activities from 10 ~J,Ci (370 kBq) to the highest dose administered to the patient (300 mCi [11.1 GBq] ofiodine-131 for therapy at our institution). The simplest method of linearity testing utilizes commercial attenuator kits. These k...

The kerma-area product (PKA) is a useful quantity to establish the reference levels in diagnosis of conventional X ray examinations. A KAP meter can be calibrated in laboratory or in situ, where it is used. The patient dose calibrator (PDC) is a new equipment from Radcal that measures PKA. It was manufactured following the IEC 60580 recommendations. The aim of this study was to calibrate the PD...