Validation of CT doses of SPECT/CT and PET/CT hybrid devices lessons learned /
Validation of CT doses of SPECT/CT and PET/CT hybrid devices: lessons learned Sera, Terez; Porubszky, Tamas; Papos, Miklos; Elek, Richard; Besenyi, Zsuzsanna; Gion, Katalin; Bartha, Andras; Pellet, Sandor; Pavics, Laszlo Abstract The aim of the study was to check the validity of computed tomographic...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
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2014
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| Sorozat: | NUCLEAR MEDICINE COMMUNICATIONS
35 No. 5 |
| Tárgyszavak: | |
| doi: | 10.1097/MNM.0000000000000087 |
| mtmt: | 2584888 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/24198 |
| Tartalmi kivonat: | Validation of CT doses of SPECT/CT and PET/CT hybrid devices: lessons learned Sera, Terez; Porubszky, Tamas; Papos, Miklos; Elek, Richard; Besenyi, Zsuzsanna; Gion, Katalin; Bartha, Andras; Pellet, Sandor; Pavics, Laszlo Abstract The aim of the study was to check the validity of computed tomographic (CT) doses exhibited by SPECT/CT and PET/CT hybrid devices. Dose measurements were taken from four SPECT/CT and four PET/CT cameras commercially available from different manufacturers. A calibrated ionization chamber was placed in whole-body or head phantoms for the acquisition of CT images with clinically used parameters. Computed tomography dose index (CTDIvol) values were calculated according to the IEC 60601-2-44:1999 formula. The measured CTDIvol doses were compared with those preprogrammed by the manufacturer. In the case of the whole-body phantom, the differences between the measured and displayed values varied between −31 and +24% [European document RP162 (2012) sets up the limit for acceptance criterion as ±20%]. The head phantom data showed either an agreement between −10 and +24%, or an underestimation by two-fold. The latter seemed to be because, while preprogramming the doses, the manufacturer had used the whole-body phantom instead of a proper head phantom. The results of the work demonstrate the need for individual dosimetric calibration of every single X-ray tube. Dosimetric checks should be included in the regular quality control programmes of the SPECT/CT and PET/CT devices. Special attention should be paid to head-and-neck and paediatric protocols, in which the use of a head phantom is recommended for dose calibration. © 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins |
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| Terjedelem/Fizikai jellemzők: | 534-538 |
| ISSN: | 0143-3636 |