X-Ray Dark-Field Signal Reduction Due to Hardening of the Visibility Spectrum

被引：1

作者：

De Marco, Fabio ^{[1
,2
]}

Andrejewski, Jana ^{[1
,2
,3
]}

Urban, Theresa ^{[1
,2
]}

Willer, Konstantin ^{[1
,2
,4
]}

Gromann, Lukas ^{[1
,2
,5
]}

Koehler, Thomas ^{[6
,7
]}

Maack, Hanns-Ingo ^{[8
]}

Herzen, Julia ^{[1
]}

Pfeiffer, Franz ^{[1
,2
,7
,9
]}

机构：

[1] Tech Univ Munich, Munich Inst Biomed Engn, Chair Biomed Phys, Dept Phys, D-85748 Garching, Germany

[2] Univ Trieste, Dept Phys, I-32127 Trieste, Italy

[3] Hamamatsu Photon Deutschland GmbH, D-82211 Herrsching Am Ammersee, Germany

[4] Deloitte Consulting GmbH, D-81669 Munich, Germany

[5] Rodenstock GmbH, D-80687 Munich, Germany

[6] Philips Res, D-22335 Hamburg, Germany

[7] Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany

[8] Philips Med Syst DMC GmbH, D-22335 Hamburg, Germany

[9] Tech Univ Munich, Dept Diagnost & Intervent Radiol, Klinikum Rechts Isar, D-81675 Munich, Germany

来源：

IEEE TRANSACTIONS ON MEDICAL IMAGING | 2024年 / 43卷 / 04期

基金：

欧洲研究理事会;

关键词：

X-ray imaging; Gratings; Attenuation; Imaging; Photonics; Aluminum; Physics; Quantification and estimation; tissue modeling; computed tomography; NEUTRON-SCATTERING; CONTRAST;

D O I：

10.1109/TMI.2023.3337994

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

X-ray dark-field imaging enables a spatially-resolved visualization of ultra-small-angle X-ray scattering. Using phantom measurements, we demonstrate that a material's effective dark-field signal may be reduced by modification of the visibility spectrum by other dark-field-active objects in the beam. This is the dark-field equivalent of conventional beam-hardening, and is distinct from related, known effects, where the dark-field signal is modified by attenuation or phase shifts. We present a theoretical model for this group of effects and verify it by comparison to the measurements. These findings have significant implications for the interpretation of dark-field signal strength in polychromatic measurements.

引用

页码：1422 / 1433

页数：12

共 52 条

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