Adaptive Image Rescaling for Weakly Contrast-Enhanced Lesions in Dedicated Breast CT: A Phantom Study
Purpose Dedicated breast CT is an emerging volumetric X-ray imaging modality for diagnosis that does not require any painful breast compression. To improve the detection rate of weakly enhanced lesions, an adaptive image rescaling (AIR) technique was proposed. Materials and Methods Two disks cont...
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| Main Authors: | , , , , , , , , , |
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| Format: | article |
| Language: | EN KO |
| Published: |
The Korean Society of Radiology
2021
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| Subjects: | |
| Online Access: | https://doaj.org/article/50f9c90ccc6f486885a20544b577722c |
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| Summary: | Purpose Dedicated breast CT is an emerging volumetric X-ray imaging modality for diagnosis
that does not require any painful breast compression. To improve the detection rate of weakly
enhanced lesions, an adaptive image rescaling (AIR) technique was proposed.
Materials and Methods Two disks containing five identical holes and five holes of different diameters
were scanned using 60/100 kVp to obtain single-energy CT (SECT), dual-energy CT
(DECT), and AIR images. A piece of pork was also scanned as a subclinical trial. The image quality
was evaluated using image contrast and contrast-to-noise ratio (CNR). The difference of imaging
performances was confirmed using student’s t test.
Results Total mean image contrast of AIR (0.70) reached 74.5% of that of DECT (0.94) and was
higher than that of SECT (0.22) by 318.2%. Total mean CNR of AIR (5.08) was 35.5% of that of SECT
(14.30) and was higher than that of DECT (2.28) by 222.8%. A similar trend was observed in the
subclinical study.
Conclusion The results demonstrated superior image contrast of AIR over SECT, and its higher
overall image quality compared to DECT with half the exposure. Therefore, AIR seems to have
the potential to improve the detectability of lesions with dedicated breast CT. |
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