Evaluating the performance of a MOSFET dosimeter at diagnostic X-ray energies for interventional radiology

Chida, Koichi; Inaba, Yohei; Masuyama, H.; Yanagawa, Isao; Mori, Ikue; Saito, Haruo; Maruoka, Shin; Zuguchi, Masayuki

doi:10.1007/s12194-008-0044-z

Cited by 55 publications

(25 citation statements)

References 12 publications

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“…Both F c andC kV , however, are different from those found in the literature. 22,27 The average correction factor found by Chida 27 was approximately 0.28, while that measured by Ding 22 was approximately 0.32. However, Chida did not specify the mAs and Ding used very low values (up to 2 mAs) and a kV source (Varian OBI, Palo Alto, CA) specific for IGRT procedures which may have characteristics, in terms of spectrum filtration, different from the C-arc used in this work.…”

Section: Discussionmentioning

confidence: 87%

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Characterization of a cable‐free system based on p‐type MOSFET detectors for “in vivo” entrance skin dose measurements in interventional radiology

Falco¹,

D’Andrea

Strigari

et al. 2012

Medical Physics

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Section: Discussionmentioning

confidence: 87%

“…There are only two other studies in the literature which characterize this system in an energy range different than the one for which it was designed. 22,27 However, in these studies the ESD was not determined. Our aim was to establish a procedure to determine the ESD during RIP.…”

Section: Discussionmentioning

confidence: 91%

Characterization of a cable‐free system based on p‐type MOSFET detectors for “in vivo” entrance skin dose measurements in interventional radiology

Falco¹,

D’Andrea

Strigari

et al. 2012

Medical Physics

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“…In their example, a difference of 8 Gy between standard and non-standard methods was observed [11]. Therefore, the QC of X-ray systems is very important [14][15][16][17][18][19].…”

Section: Discussionmentioning

confidence: 99%

A Rotatable Quality Control Phantom for Evaluating the Performance of Flat Panel Detectors in Imaging Moving Objects

et al. 2015

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As the use of diagnostic X-ray equipment with flat panel detectors (FPDs) has increased, so has the importance of proper management of FPD systems. To ensure quality control (QC) of FPD system, an easy method for evaluating FPD imaging performance for both stationary and moving objects is required. Until now, simple rotatable QC phantoms have not been available for the easy evaluation of the performance (spatial resolution and dynamic range) of FPD in imaging moving objects. We developed a QC phantom for this purpose. It consists of three thicknesses of copper and a rotatable test pattern of piano wires of various diameters. Initial tests confirmed its stable performance. Our moving phantom is very useful for QC of FPD images of moving objects because it enables visual evaluation of image performance (spatial resolution and dynamic range) easily.

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“…Interventional radiology (IVR) confers a higher risk of radiation‐related injury to both the patient and physician compared with other types of X‐ray examination 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 . Even today, there are case reports of injuries (such as radiation‐induced erythema) caused by the radiation from IVR X‐ray systems 13 , 14 , 15 .…”

Section: Introductionmentioning

confidence: 99%

A cross‐sectional study of the radiation dose and image quality of X‐ray equipment used in IVR

Inaba

Chida

Kobayashi

et al. 2016

J Applied Clin Med Phys

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There are case reports of injuries caused by the radiation from interventional radiology (IVR) X‐ray systems. Therefore, the management of radiation doses in IVR is important. However, no detailed report has evaluated image quality for a large number of IVR X‐ray systems. As a result, it is unclear whether the image quality of the X‐ray equipment currently used in IVR procedures is optimal. We compared the entrance surface doses and image quality of multiple IVR X‐ray systems. This study was conducted in 2014 at 13 medical facilities using 18 IVR X‐ray systems. We evaluated image quality and simultaneously measured the radiation dose. Entrance surface doses for fluoroscopy (duration, 1 min) and cineradiography (duration, 10 s) are measured using a 20‐cm‐thick acrylic plate and skin dose monitor. The image quality (such as spatial resolution and low‐contrast detectability) of both fluoroscopy and cineradiography was evaluated using a QC phantom. For fluoroscopy, the average entrance surface dose using the 20‐cm‐thick acrylic plate was 13.9 (range 2.1–28.2) mGy/min. For cineradiography, the average entrance surface dose was 24.6 (range 5.1–49.3) mGy/10 s. We found positive correlations between radiation doses and image quality scores, in general, especially for fluoroscopy. The differences in surface dose among the 18 IVR X‐ray systems were high (max/min, 9.7‐fold for cineradiography; 13.4‐fold for fluoroscopy). The differences in image quality scores (spatial resolution, low‐contrast detectability, and dynamic range) were also very large. In general, there tended to be a correlation between radiation dose and image quality. Periodical measurements of the radiation dose and image quality of the X‐ray equipment used for cineradiography and fluoroscopy in IVR are necessary. The need to minimize patient exposure requires that the dose be reduced to the minimum level that will generate an image with an acceptable degree of noise.PACS number(s): 87.57.C, 87.57.uq, 87.59.B, 87.59.bf, 87.59.C, 87.59.cf, 87.59.Dj

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Evaluating the performance of a MOSFET dosimeter at diagnostic X-ray energies for interventional radiology

Cited by 55 publications

References 12 publications

Characterization of a cable‐free system based on p‐type MOSFET detectors for “in vivo” entrance skin dose measurements in interventional radiology

Characterization of a cable‐free system based on p‐type MOSFET detectors for “in vivo” entrance skin dose measurements in interventional radiology

A Rotatable Quality Control Phantom for Evaluating the Performance of Flat Panel Detectors in Imaging Moving Objects

A cross‐sectional study of the radiation dose and image quality of X‐ray equipment used in IVR

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