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Image quality and dose evaluation in spiral chest CT examinations of patients with lung carcinoma

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Morán, L.M. and Rodríguez, R. and Calzado, A. and Turrero, Agustín and Arenas, A. and Cuevas, A. and García Castaño, B. and Gómez, N. and Morán, P. (2004) Image quality and dose evaluation in spiral chest CT examinations of patients with lung carcinoma. British Journal of Radiology, 77 (922). pp. 839-846. ISSN 0007-1285

Official URL: http://www.birpublications.org/doi/full/10.1259/bjr/71539623


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Abstract

A study was undertaken to assess the quality of general chest CT examinations for indication of lung carcinoma according to the criteria proposed in the European Commission (EC) Guidelines, and to investigate their usefulness in the optimization of this practice. The criteria were evaluated for a sample of 100 examinations from five radiology departments in the Madrid area featuring single slice helical CT scanners with special emphasis on radiation dose and image quality. To determine the degree of compliance with the image criteria considered, the examinations were independently evaluated twice by five radiologists from the participating centres. A subsequent selection of the observers was made according to the consistency and independence of their readings. Dose measurements carried out in parallel supplied data to estimate the values of the CT dose indices (CTDI), dose-length product (DLP) and effective dose (E). The results show good compliance with the image criteria used - between 93% and 98% on average at the different sites, with variable degrees of internal deviation. 10 out of a total of 16 criteria proposed in the EC guidelines were met by practically all the examinations in the sample. The average weighted CTDI (CTDIw) values per site were in the range of 13-19 mGy; those of DLP were between 263 mGy cm and 577 mGy cm, and those of effective dose between 4 mSv and 9 mSv. The highest mean DLP value was below but close to the reference value proposed in the EC Document (650 mGy cm). In general, a weak correlation or no correlation at all was found between image quality scores and patient dose (DLP).


Item Type:Article
Uncontrolled Keywords:EMTREE medical terms: adult; article; clinical practice; controlled study; correlation analysis; dosimetry; equipment design; Europe; hospital department; human; image quality; lung carcinoma; major clinical study; observer variation; practice guideline; quality control; radiation dose; radiation response; radiological parameters; reference value; scoring system; Spain; spiral computer assisted tomography; standard; thorax radiography; clinical trial; computer assisted tomography; evaluation; lung tumor; methodology; multicenter study; radiography. MeSH: Humans; Lung Neoplasms; Observer Variation; Radiation Dosage; Tomography, X-Ray Computed
Subjects:Sciences > Mathematics > Applied statistics
Medical sciences > Biology
ID Code:30899
Deposited On:15 Jun 2015 10:55
Last Modified:15 Jun 2015 10:55

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