# Detection of Hepatic Metastasis from Early Delayed Images of Modified Dual-Time-Point F-18 FDG PET/CT Images in a Patient with Breast Cancer

## TL;DR

A case study shows how modified PET/CT imaging detected liver metastasis in a breast cancer patient more effectively than standard methods.

## Contribution

Modified dual-time-point PET/CT with 80-minute delayed imaging detected metastasis not visible in standard scans.

## Key findings

- Focal FDG uptake in the liver was detected in 80-minute delayed images.
- The metastatic lesion was not visible in the usual one-hour post-injection images.
- Modified PET/CT reduces scanning time and radiation exposure compared to traditional methods.

## Abstract

We present a rare case of focal F-18-2-fluoro-2-deoxyglucose (FDG) uptake in the liver observed during a modified dual-time-point F-18 FDG positron emission tomography (PET)/computed tomography (CT), so-called early delayed scanning, in a 53-year-old woman diagnosed with breast cancer. This metastatic lesion was revealed in 80 min delayed images after FDG injection, but not in the usual one-hour images after injection. Modified dual-time-point F-18 FDG PET/CT is convenient because compared to the 2 h delayed images of dual-time-point PET/CT, it has a shorter scanning time and avoids additional radiation exposure.