X-Ray-Based Medical Imaging and Resolution

Huda, Walter; Abrahams, R Brad

doi:10.2214/ajr.14.13126

Cited by 79 publications

(44 citation statements)

References 14 publications

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“…Therefore, the imaging diagnostics of those small bones especially benefit from high spatial resolution. Radiography, however, has a much higher spatial resolution than the sectional imaging methods, which is a clear advantage in this particular region of the body and could explain the similar results regarding the sensitivity for fractures [25]. An essential advantage of the CT imaging is the superimposition-free representation by means of cross-sectional images.…”

Section: Discussionmentioning

confidence: 99%

Comparing the diagnostic performance of radiation dose-equivalent radiography, multi-detector computed tomography and cone beam computed tomography for finger fractures – A phantom study

Reidelbach¹,

Goerke²,

Leschka³

et al. 2019

PLoS ONE

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Purpose To compare the diagnostic performance and raters´confidence of radiography, radiography equivalent dose multi-detector computed tomography (RED-MDCT) and radiography equivalent dose cone beam computed tomography (RED-CBCT) for finger fractures. Methods Fractures were inflicted artificially and randomly to 10 cadaveric hands of body donors. Radiography as well as RED-MDCT and RED-CBCT imaging were performed at dose settings equivalent to radiography. Images were de-identified and analyzed by three radiologists regarding finger fractures, joint involvement and confidence with their findings. Reference standard was consensus reading by two radiologists of the fracturing protocol and high-dose multi-detector computed tomography (MDCT) images. Sensitivity and specificity were calculated and compared with Cochrane´s Q and post hoc analysis. Rater´s confidence was calculated with Friedman Test and post hoc Nemenyi Test. Results Rater´s confidence, inter-rater correlation, specificity for fractures and joint involvement were higher in RED-MDCT and RED-CBCT compared to radiography. No differences between the modalities were found regarding sensitivity. Conclusion In this phantom study, radiography equivalent dose computed tomography (RED-CT) demonstrates a partly higher diagnostic accuracy than radiography. Implementing RED-CT in the diagnostic work-up of finger fractures could improve diagnostics, support correct classification and adequate treatment. Clinical studies should be performed to confirm these preliminary results.

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Section: Discussionmentioning

confidence: 99%

Comparing the diagnostic performance of radiation dose-equivalent radiography, multi-detector computed tomography and cone beam computed tomography for finger fractures – A phantom study

Reidelbach¹,

Goerke²,

Leschka³

et al. 2019

PLoS ONE

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“…However, the spatial resolutions of the CBCT and X‐ray imaging commonly applied for 3D imaging range from 0.1 to 1 mm. (Huda & Abrahams, ). Until now, the use of imaging devices in dentistry has been hampered by the limited resolution of anatomical structure.…”

Section: Introductionmentioning

confidence: 85%

Synchrotron radiation‐based analysis of fatigue in dental restorative materials

Yoo

Kim

Min

et al. 2020

Microscopy Res & Technique

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“…The spatial resolution of an image depends, among others, on the focal spot size, the sample movement, the scintillator thickness, and the pixel size. 8 According to the Nyquist limit of 0.5 lp/px, the maximal achievable spatial resolution depends on the effective pixel size of the detector. In order to obtain the spatial resolution in linepairs per millimeter, an analysis of the power spectrum has been performed with the method proposed by Modregger et al 40 This approach is an objective criterion for the estimation of the resolution of an image with the sample in the beam path.…”

Section: Analysis Of the Image Qualitymentioning

confidence: 99%

“…As a consequence, monochromatic radiation enables increasing the spatial resolution while the MGD is reduced. In breast imaging, the spatial resolution is an important factor especially for the detection of microcalcifications where a high resolution depending on several different aspects 8 is desirable. Several published studies show the successful application of propagation-based phase-contrast mammography at synchrotrons with special focus on dose and improved diagnostic image content.…”

Section: Introductionmentioning

confidence: 99%

Dose and spatial resolution analysis of grating-based phase-contrast mammography using an inverse Compton x-ray source

et al. 2020

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Purpose: Although the mortality rate of breast cancer was reduced with the introduction of screening mammography, many women undergo unnecessary subsequent examinations due to inconclusive diagnoses. Superposition of anatomical structures especially within dense breasts in conjunction with the inherently low soft tissue contrast of absorption images compromises image quality. This can be overcome by phase-contrast imaging. Approach: We analyze the spatial resolution of grating-based multimodal mammography using a mammographic phantom and one freshly dissected mastectomy specimen at an inverse Compton x-ray source. Here, the focus was on estimating the spatial resolution with the sample in the beam path and discussing benefits and drawbacks of the method used and the estimation of the mean glandular dose. Finally, the possibility of improving the spatial resolution is investigated by comparing monochromatic grating-based mammography with the standard one. Results: The spatial resolution is constant or also higher for the image acquired with monochromatic radiation and the contrast-to-noise ratio (CNR) is higher in our approach while the dose can be reduced by up to 20%. Conclusions: In summary, phase-contrast imaging helps to improve tumor detection by advanced diagnostic image quality. We demonstrate a higher spatial resolution for one mastectomy specimen and increased CNR at an equal or lower dose for the monochromatic measurements.

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X-Ray-Based Medical Imaging and Resolution

Cited by 79 publications

References 14 publications

Comparing the diagnostic performance of radiation dose-equivalent radiography, multi-detector computed tomography and cone beam computed tomography for finger fractures – A phantom study

Comparing the diagnostic performance of radiation dose-equivalent radiography, multi-detector computed tomography and cone beam computed tomography for finger fractures – A phantom study

Synchrotron radiation‐based analysis of fatigue in dental restorative materials

Dose and spatial resolution analysis of grating-based phase-contrast mammography using an inverse Compton x-ray source

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