Estimation of Radiation Dosimetry for some Common SPECT-CT Exams

Authors

  • Aida Mhiri Université de Tunis El Manar, Faculté de Médecine de Tunis, Salah AZAIEZ Institute, Nuclear Medicine Department
  • Ihsen Slim Université de Tunis El Manar, Faculté de Médecine de Tunis, Salah AZAIEZ Institute, Nuclear Medicine Department
  • Mohamed Ghezaiel Université de Tunis El Manar, Faculté de Médecine de Tunis, Biophysic Department
  • Mohamed Faouzi Ben Slimène Université de Tunis El Manar, Faculté de Médecine de Tunis, Salah AZAIEZ Institute, Nuclear Medicine Department

DOI:

https://doi.org/10.6000/1927-3037.2012.01.04.7

Keywords:

Single photon emission computed tomography (SPECT), X ray computed tomography (CT), Dosimetry, nuclear medicine

Abstract

Single photon emission computed tomography associated to X ray computed tomography (SPECT-CT) is a nuclear medicine tomographic imaging technique which improves diagnostic accuracy for particular clinical indications due to the possible attenuation and/or scatter correction of the SPECT functional images and the availability of helpful anatomic information. However, the introduction of CT in the nuclear diagnostic process results in a significant increase of the patient dose. Ideally is to establish sufficient image quality for a specific diagnostic task with the lowest effective dose to the patient in order to reduce stochastic effects. Indication of SPECT-CT should be made to adhere to the "As Low as Reasonably Achievable (ALARA)" principle and ensure that the patient is not subjected to unnecessarily high levels of radiation.

In this study, we evaluate effective doses received during some standard nuclear medicine exams from 100 patients who underwent SPECT-CT in our department and analyze parameters involved in variation of these doses according to the literature data.

References


[1] Mhiri A, Slim I, Ghezaiel M, Meddeb I, El Bez I, Yeddes I, et al. L’apport de l’imagerie hybride TEMP/TDM dans la prise en charge du cancer différencié de la thyroïde. Médecine Nucléaire. Imagerie Fonctionnelle et Métabolique 2012; 36: 554-60. http://dx.doi.org/10.1016/j.mednuc.2012.08.008
[2] Larkin AM, Serulle Y, Wagner S, Noz ME, Friedman K. Quantifying the Increase in Radiation Exposure Associated with SPECT/CT Compared to SPECT Alone for Routine Nuclear Medicine Examinations. Int J Mol Imag 2011; 5 pages.
[3] Wall BF, Hart D, Revised radiation doses for typical X-ray examinations: report on a recent review of doses to patients from medical X-ray examinations in the UK by NRPB. Br J Radiol1997; 70: 437-9.
[4] Valentin J. Managing patient dose in multi-detector computed tomography(MDCT) ICRP Publication 102. Annals ICRP2007; 37: 1-79. DOI: 10.1016/j.icrp.2007.09.001
[5] The measurement, reporting and management of radiation dose. CT. Report of AAPM Task Group 23 no. 96, diagnostic Imaging Council CT Committee 2008.
[6] Radiation dose to patients from radiopharmaceuticals ICRP Publication 53. Annals ICRP 1987; 18: 1-4. http://www.icrp.org/docs/P053_addendum_4_%28interim_2002-10-15%29.pdf
[7] Valentin J. Radiation dose to patients from radiopharmaceuticals (Addendum 2 to ICRP publication 53) ICRP publication 80 approved by the commission in September 1997. Annals ICRP 1998; 28: 1-126.
[8] International Commission on Radiological Protection. Radiation dose to patients from radiopharmaceuticals. Oxford, Pergamon Press 1987. Publication 53; 18: 4.
[9] Shrimpton PC, Hillier MC, Lewis MA, Dunn M. National survey of doses from CT in the UK. Br J Radiol 2003; 79: 968-80. http://dx.doi.org/10.1259/bjr/93277434
[10] Larkin AM, Serulle Y, Wagner S, Noz ME, Friedman K. Quantifying the Increase in Radiation Exposure Associated with SPECT/CT Compared to SPECT Alone for Routine Nuclear Medicine Examinations. Int J Mol Imag 2011; Article ID 897202, doi:10.1155/2011/897202
[11] Mettler FA, Huda W, Yoshizumi TT, Mahesh M. Effective doses in radiology and diagnostic nuclear medicine: a catalog. Radiology 2008; 248: 254-63. doi: 10.1148/radiol.2481071451
[12] Office de Protection contre les Rayonnements Ionisants et Société Française de Radiologie. Les procédures radiologiques: Critères de qualité et optimisation des doses 2001.
[13] Kalender WA, Buchenau S, Deak P, Kellermeier M, Langner O, et al. Technical approaches to the optimisation of CT. Physica Med 2008; 24: 71-9. http://dx.doi.org/10.1016/j.ejmp.2008.01.012
[14] Kalra MK, Maher MM, Toth TL, Hamberg LM, Blake MA, et al. Strategies for CT radiation dose optimization. Radiology 2004; 230: 619-28. http://dx.doi.org/10.1148/radiol.2303021726
[15] Mattsson S, Söderberg M. Radiation dose management in CT, SPECT/CT and PET/CT techniques. Radiat Prot Dosim 2011; 147: 13-21. http://dx.doi.org/10.1093/rpd/ncr261
[16] Frush DP. Pediatric dose reduction in computed tomography. Health Phys 2008; 95: 518-27. http://dx.doi.org/10.1097/01.HP.0000326335.34281.63
[17] Funama Y, Awai K, Nakayama Y, Kakel K, Nagasue N, et al. Radiation dose reduction without degradation of low-contrast detectability at abdominal multisection CT with a low-tube voltage technique: phantom study. Radiology 2005; 237: 905-10. http://dx.doi.org/10.1148/radiol.2373041643
[18] Kalender WA, Deak P, Kellermeier M, van Straten M, Vollmar SV. Application- and patient size-dependent optimization of x-ray spectra for CT. Med Phys 2009; 36: 993-1007. http://dx.doi.org/10.1118/1.3075901
[19] Directive européenne 97/43/Euratom du Conseil du 30 mai 1996. Official J 1997; L 180: 22-7.

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2013-01-06

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