Evaluation of Low-contrast Detectability Using the Digital Phantom Creation Tool in the Late Arterial Phase to Detect Liver Mass Lesions
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- Harada Kohei
- Division of Radiology, Sapporo Medical University Hospital
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- Imai Tatsuya
- Division of Radiology, Sapporo Medical University Hospital
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- Ohashi Yoshiya
- Division of Radiology, Sapporo Medical University Hospital
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- Chiba Ayaka
- Division of Radiology, Sapporo Medical University Hospital
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- Numasawa Kanako
- Division of Radiology, Sapporo Medical University Hospital
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- Hayasaka Shun
- Division of Radiology, Sapporo Medical University Hospital
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- Omori Go
- Division of Radiology, Sapporo Medical University Hospital
Bibliographic Information
- Other Title
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- 肝腫瘤性病変検出を目的とした後期動脈相におけるdigital phantom作成ツールを用いた低コントラスト検出能の評価
- カン シュリュウセイ ビョウヘン ケンシュツ オ モクテキ ト シタ コウキ ドウミャクソウ ニ オケル digital phantom サクセイ ツール オ モチイタ テイコントラスト ケンシュツノウ ノ ヒョウカ
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Abstract
<p> Purpose: Late arterial phase images of SD 8, SD 10, and SD 12 were acquired in the 3-phase dynamic study of the liver in combination with hybrid iterative reconstruction. We evaluated the low-contrast detectability by adding a simulated tumor to these images and aimed to formulate a standard image quality. Methods: We prepared images with and without signal for 60 series of 20 samples, each with 3 image quality types (total: 120 series). The continuous confidence method by 10 observers detected 60 simulated tumors. Results: The detection sensitivities were 0.765, 0.785, and 0.260 for SD 8, SD 10, and SD 12, respectively (p<0.001) with no significantly different specificities, and the areas under the curve were 0.901, 0.892, and 0.616 (p<0.001), respectively. The simulated mass detection rates were 74.5%, 75.0%, and 21.5% for SD 8, SD 10, and SD 12, respectively (p<0.001), and the intraclass correlation coefficients, which indicate interobserver reliability, were 0.697 at SD 10 without signal, and SD 12 without a signal significantly dropped to 0.185. Conclusion: Therefore, SD 12 images increase the possibility of overlooking lesions. Hence, image quality in the late arterial phase should be SD 10 or less.</p>
Journal
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- Japanese Journal of Radiological Technology
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Japanese Journal of Radiological Technology 79 (7), 674-681, 2023
Japanese Society of Radiological Technology
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Details 詳細情報について
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- CRID
- 1390578304519124608
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- NII Book ID
- AN00197784
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- ISSN
- 18814883
- 03694305
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- NDL BIB ID
- 032988631
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- PubMed
- 37286500
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
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- Abstract License Flag
- Disallowed