Evaluación de la calidad de imagen y de la dosis en exámenes de TC helicoidal de tórax en pacientes con carcinoma de pulmón. Resultados preliminares.
Evaluation of image quality and dose in thoracic spiral CT examinations in patients with pulmonary carcinoma. Preliminary results



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Morán Blanco, L.M. and Rodríguez González, R. and Calzado Cantera, A. and De Pablo, A.A. and Baeza Trujillo, M. and Cuevas Ibáñez, A. and García Castaño, B. and Gómez León, N. and Turrero, Agustín and Morán Penco, P. (2002) Evaluación de la calidad de imagen y de la dosis en exámenes de TC helicoidal de tórax en pacientes con carcinoma de pulmón. Resultados preliminares. Radiología, 44 (6). pp. 229-236. ISSN 0033-8338

Official URL: http://www.sciencedirect.com/science/article/pii/S0033833802778028


We have applied criteria for CT quality defined in the European Guidelines to a sample of thoracic CT examinations - for the indication of pulmonary carcinoma - of 5 institutions of the Community of Madrid that have spiral CT equipment. The selected examinations have been evaluated independently by five radiologists to determine the degree of adherence to the quality criteria for image defined in the Guideliness for examinations of general thorax. Dosimetric measurements carried out in parallel have served to estimate the values of CT (CTDIw) dose indices, dose-length product (DLP) and effective dose for every patient. The results show a high global adherence to the quality criteria (96%), with averages per institution being between 94% (in two institutions) and 98% (in three institutions). There are 10 of 16 criteria that are adhered to in all examinations of the sample; those which are not adhered to systematically are: two of visualization (1.1 and 1.4), with 92-96% fulfillment, and four of critical reproduction (2.6; 2.8; 2.9 and 2.10), with percentages of adherence between 91% and 96%. The average CTDIw values per institution are in the interval 12.9-19.1 mGy; those of DLP between 263 and 577 mGy cm and those of effective dose between 4.2 and 9.2 mSv. The DLP-image quality correlation in institutions with the best image quality was null in two of them and direct and moderate in the third. In both institutions with the poorest image quality, the correlation was inverse and moderate in one and direct and weak in the other. Reasons for these results are analyzed, as well as possible ways of optimizing quality in relation to dose and parameters used.

Item Type:Article
Uncontrolled Keywords:CT; Image quality; Quality criteria; Radiation dose. EMTREE medical terms: article; correlation analysis; diagnostic accuracy; human; image analysis; image quality; lung carcinoma; radiation dose; reproducibility; spiral computer assisted tomography.
Subjects:Sciences > Mathematics > Applied statistics
Medical sciences > Biology
ID Code:30911
Deposited On:15 Jun 2015 11:56
Last Modified:15 Jun 2015 11:56

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