Towards dose reduction in CT: patient radiation dose assessment for CT examinations at university health center in Canada and comparison with national diagnostic reference levels

Héliou, R; Normandeau, Lysanne; Beaudoin, G.

doi:10.1093/rpd/ncr024

Cited by 28 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our values are also lower than the reference effective dose s for CT scans reported from the Fleishner Society [18]. Our results are also in good agreement with those of Héliou et al [19], Treier et al [20], and Broucker et al [3].…”

Section: Discussionsupporting

confidence: 92%

Dose Optimization Studies by Selecting Kilovoltage in Oncologic Chest CT

Galiñanes¹,

Pombar²,

Rémy‐Jardin³

et al. 2016

J Biomed Eng Med Devic

View full text Add to dashboard Cite

In this work we have studied the adequacy of dose levels of irradiation in oncologic chest CT obtained in our daily practice. The secondary objective was to evaluate the effect on radiation dose of individual adjustment of kilovoltage in thoracic multidetector row computed tomography (MDCT) images acquired with both single and dual-source technology. The impact of lowering the kilovoltage in the diagnostic quality of these studies was also evaluated. 161 patients were included in the study. CT examinations were performed using two different equipments: a conventional CT scanner and a dual-source computed tomography. The average values of dose length product (DLP) obtained in our daily practice meet the recommendations of the existing referral guidelines. Lower values can be achieved through individual adjustment of kilovoltage and with dual-source CT technology, maintaining the diagnostic quality of these studies. Reduced lungcancer mortality with low-dose computed tomographic screening. The New England Journal of Medicine 365: 395-409. 23. Bankier AA, Kressel HY (2012) Through the looking glass revisited: The need for more meaning and less drama in the reporting of dose and dose reduction in CT. Radiology 265: 4-8.

show abstract

Section: Discussionsupporting

confidence: 92%

Dose Optimization Studies by Selecting Kilovoltage in Oncologic Chest CT

Galiñanes¹,

Pombar²,

Rémy‐Jardin³

et al. 2016

J Biomed Eng Med Devic

View full text Add to dashboard Cite

show abstract

“…The number and type of each radiology test performed were listed for each patient during the patient's follow-up time. A CED was calculated for each patient using our institution's dose index when available and standardized tables, otherwise, mostly from Bushberg and Mettler as shown in Table 1 for most common diagnostic imaging tests [10–12]. A high dose of radiation was defined as ≥100 mSv as it is the threshold from which an increased risk of cancer is documented [7].…”

Section: Methodsmentioning

confidence: 99%

Diagnostic Radiation Exposure in Patients with Inflammatory Bowel Disease

Langevin

Normandeau

Bouin

2019

Canadian Journal of Gastroenterology and Hepatology

View full text Add to dashboard Cite

Background. Because of the chronic and relapsing nature of inflammatory bowel disease (IBD), which often requires characterization with CT scan, IBD patients might be exposed to a large amount of radiation. As a cumulative effective dose (CED) ≥ 100 mSv is considered significant for stochastic risks of cancer, it is important to monitor and control the radiation exposure of the IBD patients. In the present work, we aimed to quantify the mean CED in IBD patients to assess any harmful effects of radiation. Methods. This study includes 200 IBD patients, identified retrospectively, from the outpatient clinics of the Centre Hospitalier de l’Université de Montréal between January 1, 2010, and February 15, 2017, from the gastroenterologists’ patients lists. The number and type of each radiology test performed were listed for each patient during the study period and the CED was calculated using our institution’s dose index when available and standardized tables. Results. Among the 200 IBD patients, 157 patients had Crohn’s disease (CD), 41 had ulcerative colitis (UC), and 2 had indeterminate colitis. The mean CED for IBD patients was 23.1 ± 45.2 mSv during a mean follow-up duration of 4.3 years. CED was higher among patients with CD than with UC (27.5 ± 49.5 versus 6.8 ± 14.8 mSv; p<0.01). Six patients were exposed to a high CED (>100 mSv) and all had CD. Conclusion. While potentially harmful levels of radiation exposure are of concern in only a small number of patients, strategies to limit such exposure are encouraged when clinically appropriate.

show abstract

“…examination justification and optimisation in accordance with the ALARA (as low as reasonably achievable) principle (22). It is now recognised that the implementation and use of DRLs is an efficient tool in the optimisation of diagnostic X-ray examinations, including CT (23). for DRLs, representative of the state of practice at the time and the population studied.…”

Section: Diagnostic Reference Levels (Drls)mentioning

confidence: 99%

“…Values are specific to a country or region assessing local radiological practices and should be updated periodically as technology advances. DRLs allow comparison of performance between various types of X-ray equipment(23).…”

mentioning

confidence: 99%

Analysis of Effective Dose at Computed Tomography in a Modern 64 slice Multidetector CT System in an Irish Tertiary Care Centre with Local and International Reference Standards

Curran¹,

Maher

McLaughlin

et al. 2020

Preprint

View full text Add to dashboard Cite

Diagnostic Reference Levels (DRLs) are used to establish if local imaging protocols have been optimised. This study examines a modern multi-detector 64 slice CT (MDCT) system for four commonly performed examinations in a large tertiary care centre by comparison with current international reference standards. Effective dose (ED) was calculated using dose-length product conversion coefficients for all patients and compared to Irish national and local DRLs, and published international point values. ED at CT abdomen-pelvis was 28.5% above the national DRL and 26% above the local DRL. ED at CT thorax was 3.5% greater than local DRL and 42.5% greater than the national DRL. ED at CT brain was 100% above both the local and national DRLs. CT cervical spine ED was 79% greater than the local and 100% greater than the national DRL.A review of study protocols is necessary to facilitate optimisation of total study radiation dose.

show abstract

Towards dose reduction in CT: patient radiation dose assessment for CT examinations at university health center in Canada and comparison with national diagnostic reference levels

Cited by 28 publications

References 8 publications

Dose Optimization Studies by Selecting Kilovoltage in Oncologic Chest CT

Dose Optimization Studies by Selecting Kilovoltage in Oncologic Chest CT

Diagnostic Radiation Exposure in Patients with Inflammatory Bowel Disease

Analysis of Effective Dose at Computed Tomography in a Modern 64 slice Multidetector CT System in an Irish Tertiary Care Centre with Local and International Reference Standards

Contact Info

Product

Resources

About