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Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

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Photon-Counting CT Effects on Sensitivity for Liver Lesion Detection: A Reader Study Using Virtual Imaging.

Benjamin Wildman-Tobriner¹, Nicholas Felice¹, Kevin R Kalisz¹

¹From the Department of Radiology, Duke University Hospital, 2301 Erwin Rd, Box 3808, Durham, NC 27701 (B.W.T., K.R.K., B.C.A., S.P.T., D.E.K., B.H., M.R.B., D.M., E.S., E.A.); Department of Biostatistics and Bioinformatics (N.F., S.M., A.E.) and Department of Medical Physics (W.P.S., E.S., E.A.), Duke University, Durham, NC.

|January 14, 2025

Summary

This summary is machine-generated.

Photon-counting CT (PCCT) demonstrated superior sensitivity in detecting small liver lesions compared to energy-integrating detector (EID) CT. This advancement offers improved diagnostic accuracy for oncology patients, particularly for subcentimeter lesions.

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Novel In Vivo Micro-Computed Tomography Imaging Techniques for Assessing the Progression of Non-Alcoholic Fatty Liver Disease

Novel In Vivo Micro-Computed Tomography Imaging Techniques for Assessing the Progression of Non-Alcoholic Fatty Liver Disease

Published on: March 24, 2023

Area of Science:

Medical Imaging
Radiology
Oncology

Background:

Detection of hepatic metastases is crucial for oncology patient management.
Computed Tomography (CT) is a primary imaging modality for this task.
Comparing novel PCCT with conventional EID CT for small lesion detection is needed.

Purpose of the Study:

To compare the sensitivity of simulated photon-counting CT (PCCT) versus energy-integrating detector (EID) CT.
To evaluate the detection of small liver lesions (0.4-1.5 cm) in a virtual imaging framework.
To assess performance under routine and low-dose CT conditions.

Main Methods:

Virtual imaging study using 50 anthropomorphic phantoms with 183 simulated liver lesions.
Simulated scans using PCCT and EID CT platforms at 6 mGy and 1.5 mGy.
Four radiologists independently reviewed scans, marking lesions and assigning confidence scores.

Main Results:

PCCT showed significantly higher sensitivity (82.1%) than EID CT (77.6%) for detecting liver lesions (P < .001).
PCCT improved detection of subcentimeter lesions (74.0% vs 67.2%) and showed higher confidence scores.
PCCT demonstrated superior performance at low-dose protocols and was independently associated with increased lesion detection odds.

Conclusions:

Photon-counting CT (PCCT) offers improved sensitivity for detecting small liver lesions compared to EID CT.
PCCT enhances diagnostic accuracy, particularly for subcentimeter lesions, and improves reader confidence.
This technology represents a significant advancement for oncologic imaging and patient management.