Data-driven respiratory gating for ventilation/perfusion lung scan.
Q J Nucl Med Mol Imaging
; 63(4): 394-398, 2019 Dec.
Article
de En
| MEDLINE
| ID: mdl-29409314
ABSTRACT
BACKGROUND:
Ventilation/perfusion lung scan is subject to blur due to respiratory motion whether with planar acquisition or single photon emission computed tomography (SPECT). We propose a data-driven gating method for extracting different respiratory phases from lung scan list-mode or dynamic data.METHODS:
The algorithm derives a surrogate respiratory signal from an automatically detected diaphragmatic region of interest. The time activity curve generated is then filtered using a Savitzky-Golay filter. We tested this method on an oscillating phantom in order to evaluate motion blur decrease and on one lung SPECT.RESULTS:
Our algorithm reduced motion blur on phantom acquisition mean full width at half maximum 8.1 pixels on non-gated acquisition versus 5.3 pixels on gated acquisition and 4.1 pixels on reference image. Automated detection of the diaphragmatic region and time-activity curves generation were successful on patient acquisition.CONCLUSIONS:
This algorithm is compatible with a clinical use considering its runtime. Further studies will be needed in order to validate this method.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Techniques d'imagerie avec synchronisation respiratoire
/
Scintigraphie de ventilation-perfusion
Limites:
Humans
Langue:
En
Journal:
Q J Nucl Med Mol Imaging
Sujet du journal:
MEDICINA NUCLEAR
Année:
2019
Type de document:
Article