Setting “Typical” Diagnostic Reference Levels for most common Computed Tomography guided Interventional procedures
Journal Title: Hellenic Journal of Radiology - Year 2019, Vol 4, Issue 1
Abstract
Purpose: The new European Radiation Protection Law and International Radiation Protection Recommendation have stressed the need to monitor high radiation dose imaging examinations involving Computed Tomography (CT). There are no known diagnostic reference levels (DRLs) for CT-guided interventions. The scope of the study was to evaluate radiation doses and define typical DRLs. Material and Methods: The study was conducted in a tertiary referral hospital. The most frequent consecutive CT-guided procedures performed without use of fluoroscopy within a period of 17 months included biopsies (n=31), microwave ablations of malignant liver lesions (n=12), abscess drainages (n=45) and nephrostomies (n=15). A total of 103 CT-guided interventions performed by a single interventional radiologist (>20 years of experience) were reviewed. Using the CT DICOM data, all technical and dosimetric data were retrospectively collected for analysis. Results: There was a large variation in number of images (N) obtained and dose length product (DLP). N varied between patients depending on complexity of case. Limited dose comparison was possible due to actual absence of dosimetric data in the recent literature. Typical DLRs were established: 980, 790, 1380 and 850 mGy.cm for biopsy, drainage, ablation and nephrostomy respectively. Conclusions: Typical DLRs were established as per the latest International Commission on Radiological Protection report 135 definition for CT-guided interventional procedures without use of fluoroscopy. These could serve as a basis for in-house and/or national values. As results showed that complexity of clinical case greatly affects number of slices and thus radiation dose, the authors plan to further investigate how case complexity may affect radiation dose.
Authors and Affiliations
Virginia Tsapaki, Dimitrios Fagkrezos, Sotiria Triantopoulou, Sofia Gourtsoyianni, Niki Lama, Charikleia Triantopoulou, Petros Maniatis
Keywords
Related Articles
- EP ID EP533188
- DOI -
- Views 125
- Downloads 0
Painless palpable scrotal mass
An 87-year-old man with dementia was referred to the orthopaedic clinic of our hospital, suffering from spinal symptoms. Clinical examination revealed swelling of the left hemiscrotum and a painless ipsilateral palpable...
PAEDIATRIC RADIOLOGY. The importance of a child specific approach
.
Sonographic appearances of intrathyroid thymus: emphasis on details
Purpose: To thoroughly describe ultrasonographic findings of intrathyroid thymus including characteristics that have not been previously emphasised. Material and Methods: Forty-six children aged 21 days-14 years (mean 5...
Acute onset of headache in an adolescent
A 16-year-old male was referred to out hospital following a three-day history of acute onset of headache. A brain computed tomography (CT) was performed at an outside institution (Figs. 1-3). His physical examination was...
Prevalence and quantification of left ventricular trabeculation detected by cardiac MR imaging in non-ischaemic primary or secondary cardiomyopathies
Purpose: To assess the prevalence and the qualitative and quantitative characteristics of left ventricular (LV) trabeculation in patients with non-ischaemic primary or secondary cardiomyopathies using detailed cardiac ma...