Comparison of Early Contrast Enhancement Models in Ultrafast Dynamic Contrast-Enhanced Magnetic Resonance Imaging of Prostate Cancer.

Tofts models have failed to produce reliable quantitative markers for prostate cancer. We examined the differences between prostate zones and lesion PI-RADS categories and grade group (GG) using regions of interest drawn in tumor and normal-appearing tissue for a two-compartment uptake (2CU) model (including plasma volume (v), plasma flow (F), permeability surface area product (PS), plasma mean transit time (MTT), capillary transit time (T), extraction fraction (E), and transfer constant (K)) and exponential (amplitude (A), arrival time (t), and enhancement rate (α)), sigmoidal (amplitude (A), center time relative to arrival time (A - T), and slope (A)), and empirical mathematical models, and time to peak (TTP) parameters fitted to high temporal resolution (1.695 s) DCE-MRI data.

Mammographic and sonographic features of tubular breast carcinoma.

Aims And Background: This study aimed to describe the mammographic and sonographic features of tubular carcinoma of the breast.

Methods: A retrospective review of 198 consecutive cases of surgically proven breast cancer revealed ten cases of tubular carcinoma of the breast. Only tumors with a tubular component of at least 75% were included in the study.

Dual-phase versus single-phase helical CT to detect and assess resectability of pancreatic carcinoma.

Objective: The aim of this study was to compare dual-phase and single-phase helical CT for the detection and assessment of resectability of pancreatic adenocarcinoma.

Subjects And Methods: We studied 60 patients (31 men, 29 women; age range, 31-84 years; mean age, 62 years) with suspected pancreatic malignancy. Patients were randomly assigned to one of two groups.