A new simpler image quality index based on body size for FDG-PET/CT.
Nucl Med Commun
; 45(1): 93-101, 2024 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-37901919
ABSTRACT
Noise equivalent count density (NEC density ) is often used to evaluate the image quality of whole-body fluorodeoxyglucose tomography tests. However, this index is calculated using the patient volume, which is difficult to obtain at every facility. In this study, we proposed new image quality indices that can be evaluated at all facilities. In total, 94 patients were enrolled in the study. The correlations of patients' body weight and BMI with volume were examined. New image quality indices normalized by body weight and BMI were defined as NEC bw and NEC bmi , respectively. Correlations between NEC bw , NEC bmi , and NEC density were examined. Further, the correlations between these two new indices and visual scores were evaluated. Good correlations were observed between volume and body weight (râ
=â
0.861, P â
<â
0.001) and between volume and BMI (râ
=â
0.728, P â
<â
0.001). NEC bw and NEC bmi correlated well with NEC density (râ
=â
0.954 for NEC bw and râ
=â
0.897 for NEC bmi , P â
<â
0.001). These correlations improved when the examined bed positions were set to the same number. Additionally, the correlations of visual scores with NEC bw and NEC bmi were similar to those between the visual score and NEC density . Our investigation indicated that the newly proposed image quality metrics, NEC bw and NEC bmi , were easily calculated and as useful as NEC density for evaluating image quality when subjects had similar physiques.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fluordesoxiglucose F18
/
Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada
Limite:
Humans
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article