Comparison Flattening Filter and Flattening Filter-Free Techniques in Small-Fields Dosimetry with Various Types of Detectors.

Purpose: The aim of this study was to investigate the detector size effect on small-field dosimetry and compare the performance of 6MV WFF/FFF techniques.

Methods: We investigated the detector size effect on small-field dosimetry and compared the performance of 6MV WFF/FFF techniques. PDD, profile curves, and absorbed dose were measured in water under reference conditions with 6MV (WFF/FFF) techniques.

Correlation of texture feature analysis with bone marrow infiltration in initial staging of patients with lymphoma using F-fluorodeoxyglucose positron emission tomography combined with computed tomography.

Purpose: To explore whether radiomic features of fluorine-18-fluorodeoxyglucose (F-FDG) positron emission tomo-graphy-computed tomography (PET/CT) has association with bone marrow infiltration (BMI) in comparison to other conventional PET metrics.

Material And Methods: Forty-four patients (with pathologically proven lymphoma disease) underwent staging F-FDG PET/CT scan. Primary tumour was semi-automatically or manually segmented with a threshold standardised uptake value (SUV) of 3.