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Titolo:
Clinical evaluation of a new stationary high strip density antiscatter grid in comparison with a conventional moving grid: influence on image qualityand patient radiation dose
Autore:
Wamser, GR; Aichinger, H; Maier, W; Bohndorf, K;
Indirizzi:
Klinikum Augsburg, Dept Diagnost Radiol & Neuroradiol, D-86156 Augsburg, Germany Klinikum Augsburg Augsburg Germany D-86156 ol, D-86156 Augsburg, Germany
Titolo Testata:
EUROPEAN RADIOLOGY
fascicolo: 9, volume: 11, anno: 2001,
pagine: 1710 - 1719
SICI:
0938-7994(2001)11:9<1710:CEOANS>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTI-SCATTER GRIDS; X-RAY-DETECTOR; DIAGNOSTIC-RADIOLOGY; AMORPHOUS-SILICON; MONTE-CARLO; FLAT-PANEL; PERFORMANCE; RADIOGRAPHY;
Keywords:
antiscatter grid; diagnostic radiology; image quality; radiation dose; radiation measurements;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Wamser, GR Klinikum Augsburg, Dept Diagnost Radiol & Neuroradiol, Stenglinstr 2, D-86156 Augsburg, Germany Klinikum Augsburg Stenglinstr 2 Augsburg Germany D-86156 rmany
Citazione:
G.R. Wamser et al., "Clinical evaluation of a new stationary high strip density antiscatter grid in comparison with a conventional moving grid: influence on image qualityand patient radiation dose", EUR RADIOL, 11(9), 2001, pp. 1710-1719

Abstract

This study aimed to evaluate a new stationary 13/75 anti-scatter grid in comparison with a moving 12/40 grid with regard to its influence on image quality and patient radiation dose. One hundred consecutive patients had plain films of the abdomen using a moving 12/40 grid and another 100 patients were examined with a stationary 13/75 grid (tube voltage 73 kV, film size 35cm x 43 cm, film-screen system speed class 400). As an intraindividual comparison, radiographs of the abdomen with a film size of 18 cm x 43 cm were taken of 27 patients using both grid types for every patient. Patients' weight and dose-area product were recorded. Image quality was evaluated by a multireader study using standardized questionnaires and three- or five-levelgrading systems. Results showed that use of the 13/75 grid accords with the ALARA principle: measurement of the dose-area product demonstrated a dosesaving of 24% for a film size of 35 cm x 43 cm and a saving of 34% for a film size of 18 cm x 43 cm without calling into question the diagnostic image quality. The mean scores of the 12/40 grid were lower for three out of six normal anatomic structures (P < 0.05) among the 200 patients, indicating a loss of image quality with the 13/75 grid. Assessment of the intraindividual trial revealed reduced detectability of three out of four anatomical details when the 13/75 grid was employed. At the cost of a minor loss of image quality in comparison with the 12/40 grid, the new stationary grid provides a clear reduction of radiation dose under clinical circumstances.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 12:25:40