Pseudoplanar images obtained from pulmonary SPECT: Agreement of reading and comparison to planar images
Fiche publication
Date publication
avril 2009
Auteurs
Membres identifiés du Cancéropôle Est :
Pr BRUNOTTE François
Tous les auteurs :
Clappuccini R, Boichot C, Cochet A, Touzery C, Dygai-Cochet I, Berriolo-Riedinger A, Toubeau M, Brunotte F
Lien Pubmed
Résumé
Purpose. - Due to a long time of acquisition, performing during the same examination planar and pulmonary tomography is time expensive. Then, pseudoplanar images have been advocated to be used instead of planar images in the diagnosis of pulmonary embolism. We aim to compare both kinds of images in terms of probability and to assess intra- and inter-observer agreement. Materials and methods. - Thirty-four patients referred to our unit to diagnose or rule out Pulmonary embolism, underwent a planar ventilation/perfusion (V/Q) lung scan and a V/Q lung SPECT. Using the SPECT projections, eight pseudoplanar images were created for each examination. Two experienced physicians read twice both sets of anonymous planar and pseudoplanar images. They checked the probability of pulmonary embolism using the modified PIOPED criteria but without the chest X-ray. Results. - For both readers, intra-observer agreement for pseudoplanar images is good (Kw = 0.69 and 0.78), and similar to the planar images agreement. Interobserver agreement (Kw = 0.63) is also good. Both modalities show a good agreement in terms of probability of pulmonary embolism. Conclusions. - We showed that pseudoplanar pulmonary images have a good intra- and interobserver agreement. Furthermore, in our population, these images lead to the same results in terms of probability of pulmonary embolism as those obtained using the standard planar technique. (C) 2009 Elsevier Masson SAS. All rights reserved.
Référence
Med Nucl-imag Fonct Metab. 2009 Apr;33(4):169-80