Image quality assessment of coronary artery segments using ultra-high resolution dual source photon-counting detector computed tomography.

van der Bie J ; Sharma, SP ; et al.

In: European journal of radiology, Jg. 171 (2024-02-01), S. 111282

academicJournal

Purpose: The study is intended to assess the image quality of ultra-high resolution (UHR) coronary computed tomography angiography (CCTA) performed on dual source photon-counting detector CT (PCD-CT).

Method: Consecutive patients, who underwent clinically indicated CCTA on PCD-CT (UHR 120x 0.2 mm collimation), were included. CCTA images were reconstructed at 0.2 mm slice thickness with Bv40, Bv44, Bv48 and Bv56 kernels and quantum iterative reconstruction level 4. Contrast-to-noise (CNR) and signal-to-noise ratios (SNR) were quantified from contrast-enhanced blood and subcutaneous adipose tissue. All reconstructions were scored per coronary segment (18-segment model) for presence, image quality, motion artefacts, stack artefacts, plaque presence and composition, and stenosis degree. Image quality was scored by two independent observers.

Results: Sixty patients were included (median age 62 [25th - 75th percentile: 53-67] years, 45% male, median calcium score 62 [0-217]). The mean heart rate during scanning was 71 ± 11 bpm. Median CTDIvol was 19 [16-22]mGy and median DLP 243 [198-327]mGy.cm. The SNR was 9.3 ± 2.3 and the CNR was 11.7 ± 2.6. Of the potential 1080 coronary segments (60 patients x 18 segments), 255/256 (reader1/reader2) segments could not be assessed for being absent or non-evaluable due to size. Both readers scored 85% of the segments as excellent or very good (Intraclass Correlation Coefficient: 0.88 (95% CI: 0.87-0.90). Motion artefacts were present in 45(5%) segments, stack artefacts in 60(7%) segments and metal artefacts in 9(1%) segments.

Conclusion: UHR dual-source PCD-CT CCTA provides excellent or very good image quality in 85% of coronary segments at relatively high heart rates at moderate radiation dose with only limited stack artefacts.

Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Titel:	Image quality assessment of coronary artery segments using ultra-high resolution dual source photon-counting detector computed tomography.
Autor/in / Beteiligte Person:	van der Bie J ; Sharma, SP ; van Straten M ; Hirsch, A ; Kamila, PA ; Bos, D ; Dijkshoorn, ML ; Booij, R ; Budde, RPJ
Zeitschrift:	European journal of radiology, Jg. 171 (2024-02-01), S. 111282
Veröffentlichung:	Limerick : Elsevier Science Ireland Ltd ; <i>Original Publication</i>: Stuttgart ; New York : Thieme, [c1981-, 2024
Medientyp:	academicJournal
ISSN:	1872-7727 (electronic)
DOI:	10.1016/j.ejrad.2023.111282
Schlagwort:	Humans Male Middle Aged Female Coronary Angiography methods Computed Tomography Angiography methods Heart Phantoms, Imaging Coronary Vessels diagnostic imaging Tomography, X-Ray Computed methods
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article Language: English [Eur J Radiol] 2024 Feb; Vol. 171, pp. 111282. <i>Date of Electronic Publication: </i>2024 Jan 03. MeSH Terms: Coronary Vessels* / diagnostic imaging ; Tomography, X-Ray Computed* / methods ; Humans ; Male ; Middle Aged ; Female ; Coronary Angiography / methods ; Computed Tomography Angiography / methods ; Heart ; Phantoms, Imaging Contributed Indexing: Keywords: Coronary artery disease; Coronary computed tomography angiography; Image quality; Photon-counting detector CT; Ultra-high resolution Entry Date(s): Date Created: 20240108 Date Completed: 20240214 Latest Revision: 20240214 Update Code: 20240214

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