دورية أكاديمية
Consistency of Monoenergetic Attenuation Measurements for a Clinical Dual-Source Photon-Counting Detector CT System Across Scanning Paradigms: A Phantom Study.
| العنوان: | Consistency of Monoenergetic Attenuation Measurements for a Clinical Dual-Source Photon-Counting Detector CT System Across Scanning Paradigms: A Phantom Study. |
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| المؤلفون: | Yang Y; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Rd, Shanghai, China 200025., Qin L; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Rd, Shanghai, China 200025., Lin H; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Rd, Shanghai, China 200025., Xu Z; Siemens Healthineers CT Collaboration, Shanghai, China., Schmidt B; Siemens Healthineers, Erlangen, Germany., Leidecker C; Siemens Healthineers, Erlangen, Germany., Yang W; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Rd, Shanghai, China 200025., Wen N; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Rd, Shanghai, China 200025.; The SJTU-Ruijin-UIH Institute for Medical Imaging Technology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China., Yan F; Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Rd, Shanghai, China 200025.; Faculty of Medical Imaging Technology, College of Health Science and Technology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. |
| المصدر: | AJR. American journal of roentgenology [AJR Am J Roentgenol] 2024 May; Vol. 222 (5), pp. e2330631. Date of Electronic Publication: 2024 Feb 07. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Roentgen Ray Society Country of Publication: United States NLM ID: 7708173 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1546-3141 (Electronic) Linking ISSN: 0361803X NLM ISO Abbreviation: AJR Am J Roentgenol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: <2004-> : Leesburg, VA : American Roentgen Ray Society Original Publication: Springfield, Ill., Thomas. |
| مواضيع طبية MeSH: | Phantoms, Imaging* , Tomography, X-Ray Computed*/methods , Photons*, Humans ; Radiographic Image Interpretation, Computer-Assisted/methods ; Reproducibility of Results |
| مستخلص: | BACKGROUND. Use of virtual monoenergetic images (VMIs) from multienergy CT scans can mitigate inconsistencies in traditional attenuation measurements that result from variation in scan-related factors. Photon-counting detector (PCD) CT systems produce VMIs as standard image output under flexible scanning conditions. OBJECTIVE. The purpose of this article was to evaluate the consistency of monoenergetic attenuation measurements obtained from a clinical PCD CT scanner across a spectrum of scanning paradigms. METHODS. A phantom with 10 tissue-simulating inserts was imaged using a clinical dual-source PCD CT scanner. Nine scanning paradigms were obtained across combinations of tube voltages (90, 120, and 140 kVp) and image quality (IQ) levels (80, 145, and 180). Images were reconstructed at VMI levels of 50, 60, 70, and 80 keV. Consistency of attenuation measurements was assessed, using the 120 kVp with IQ level of 145 scanning paradigm as the reference scan. RESULTS. For all scanning paradigms, attenuation measurements showed intra-class correlation of 0.999 and higher with respect to the reference scan. Across inserts, mean bias relative to the reference scan ranged from -14.9 to 13.6 HU, -2.7 to 1.7 HU, and -3.9 to 3.8 HU at tube voltages of 90, 120, and 140 kVp, respectively; and from -14.9 to 13.6 HU, -6.4 to 3.8 HU, -3.7 to 1.4 HU, and -7.2 to 4.3 HU at VMI levels of 50, 60, 70, and 80 keV, respectively. Thus, mean bias did not exceed 5 HU for any insert at tube potentials of 120 kVp and 140 kVp, nor for any insert at a VMI level of 70 keV. At a VMI level of 50 keV and tube potential of 90 kVp, mean bias exceeded 5 HU for 14 of 30 possible combinations of inserts and scanning paradigms and exceeded 10 HU for four of 30 such combinations. At VMI levels of both 60 and 80 keV, mean bias exceeded 5 HU for only two combinations of inserts and scanning paradigms, all at a tube potential of 90 kVp. CONCLUSION. PCD CT generally provided consistent attenuation measurements across combinations of scanning paradigms and VMI levels. CLINICAL IMPACT. PCD CT may facilitate quantitative applications of CT data in clinical practice. |
| التعليقات: | Comment in: AJR Am J Roentgenol. 2024 May;222(5):e2430986. doi: 10.2214/AJR.24.30986. (PMID: 38380854) |
| فهرسة مساهمة: | Keywords: monoenergetic attenuation; phantom study; photon-counting detector CT; virtual monoenergetic images; x-ray CT |
| تواريخ الأحداث: | Date Created: 20240207 Date Completed: 20240607 Latest Revision: 20240607 |
| رمز التحديث: | 20240608 |
| DOI: | 10.2214/AJR.23.30631 |
| PMID: | 38323783 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 1546-3141 |
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| DOI: | 10.2214/AJR.23.30631 |