Image Quality Determination of a Novel Low Energy X-ray Detector

被引：0

作者：

Alzahrani, Hanan ^{[1
]}

Richards, Sion ^{[2
]}

Sedgwick, Iain ^{[2
]}

Seller, Paul ^{[2
]}

Konstantinidis, Anastasios ^{[3
]}

Royle, Gary ^{[1
]}

Ricketts, Kate ^{[1
]}

机构：

[1] UCL, London WC1E 6BT, England

[2] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[3] Christie NHS Fdn Trust, Manchester M20 4BX, Lancs, England

来源：

2018 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE PROCEEDINGS (NSS/MIC) | 2018年

关键词：

BEAM COMPUTED-TOMOGRAPHY; RADIATION;

D O I：

暂无

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The demand for adequate image quality with low radiation doses for patients has greatly increased. This is especially true in the case of position verification in radiotherapy which requires a high number of images per patient. This study presents a physical characterisation of a new clinical detector based on a thick layer of structured Thallium activated Cesium Iodide. We made a critical appraisal of its performance for the first time and determined its detective quantum efficiency (DQE) by acquiring the pre-sampling modulation transfer function and normalised noise power spectrum (NNPS). The investigation was conducted with the application of three x-ray beam qualities in compliance with the International Electrotechnical Commission (IEC 62220-1:2003) standard. The spatial resolution and NNPS results led to relatively high DQE values at all energies: DQEs (0.5) were 0.46 for 54kV, 0.52-0.56 for 74kV and 0.55-0.59 for 92kV.

引用

页数：2

共 13 条

[1] Megavoltage cone beam computed tomography: Commissioning and evaluation of patient dose
Abou-Elenein, Hassan S.
Attalla, Ehab M.
Ammar, H.
Eldesoky, Ismail
Farouk, Mohamed
Zaghloul, Mohamed S.
[J]. JOURNAL OF MEDICAL PHYSICS, 2011, 36 (04) : 205 - 212
[2] Beutel J., 2000, HDB MED IMAGING
[3] Bushberg J.T., 1994, ESSENTIAL PHYS MED I
[4] Chan M.F., 2011, Biomedical imaging and intervention journal, V7
[5] Evaluation of image quality for different kV cone-beam CT acquisition and reconstruction methods in the head and neck region
Elstrom, Ulrik V.
Muren, Ludvig P.
Petersen, Jorgen B. B.
Grau, Cai
[J]. ACTA ONCOLOGICA, 2011, 50 (06) : 908 - 917
[6] IEC, 2003, MED EL EQ CHAR DIG 1
[7] Measurement of correlated noise in images of computed radiography systems and its influence on the detective quantum efficiency
Illers, H
Vandenbroucke, D
Buhr, E
[J]. MEDICAL IMAGING 2004: PHYSICS OF MEDICAL IMAGING, PTS 1 AND 2, 2004, 5368 : 639 - 647
[8] Jones D.P., 2010, Biomedical Sensors
[9] X-ray Performance Evaluation of the Dexela CMOS APS X-ray Detector Using Monochromatic Synchrotron Radiation in the Mammographic Energy Range
Konstantinidis, Anastasios C.
Szafraniec, Magdalena B.
Rigon, Luigi
Tromba, Giuliana
Dreossi, Diego
Sodini, Nicola
Liaparinos, Panagiotis F.
Naday, Steve
Gunn, Spencer
McArthur, Alan
Speller, Robert D.
Olivo, Alessandro
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2013, 60 (05) : 3969 - 3980
[10] Cone Beam CT vs. Fan Beam CT: A Comparison of Image Quality and Dose Delivered Between Two Differing CT Imaging Modalities
Lechuga, Lawrence
Weidlich, Georg A.
[J]. CUREUS, 2016, 8 (09):

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