AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Comet tail artifact1/1/2023 ![]() TI - Comet tail artifact on ultrasonography: is it a reliable finding of benign gallbladder diseases?ĪB - Purpose: The aim of this study was to evaluate whether the comet tail artifact on ultrasonography can be used to reliably diagnose benign gallbladder diseases. No malignancies were detected in any of the 150 thickened gallbladder lesions.Ĭonclusion: The ultrasonographic finding of the comet tail artifact in patients with thickened gallbladder lesions is associated with the presence of benign gallbladder diseases, and can be considered a reliable sign of benign gallbladder disease. There were no significant differences in the average length, thickness, or number of comet tail artifacts among the four diagnoses. There were no statistically significant differences in any of the clinical and ultrasonographic findings, with the exception of gallstones (P=0.007), among the four diseases. The ultrasonic feature of multiple comet-tail artifacts fan- ning out from the lung surface was. Results: All gallbladder lesions exhibiting the comet tail artifact on ultrasound examination were confirmed as benign gallbladder diseases after cholecystectomy, including 71 cases of adenomyomatosis (47.3%), 74 cases of chronic cholecystitis (49.3%), two cases of xanthogranulomatous cholecystitis (1.3%), and three cases of cholesterolosis (2.0%) there were two cases of coexistent chronic cholecystitis and low-grade dysplasia. The antero-lateral chest wall was examined using ultrasound. This study evaluated the differences in clinical and imaging findings among pathologic diagnoses. The extent of the involved lesion was classified as localized or diffuse, depending on the degree of involvement and the anatomical section of the gallbladder that was involved. Methods: This retrospective study reviewed the clinical findings, imaging findings, preoperative ultrasonographic diagnoses, and pathological diagnoses of 150 patients with comet tail artifacts who underwent laparoscopic cholecystectomy with pathologic confirmation. With each reverberation the ultrasound pulse returning back to the probe is much weaker and it quickly fades.Purpose: The aim of this study was to evaluate whether the comet tail artifact on ultrasonography can be used to reliably diagnose benign gallbladder diseases. Some of the reverberating pulse is reflected back to the transducer but much more is reflected off in other directions. The ultrasound pulse is trapped between reflective surfaces that are not parallel. The reverberation focus is a tiny area of interstitial fibrous tissue or fluid with non parallel surfaces. Originating at the pleural surface is an echogenic vertical comet tail artefact. Sliding is seen as the two pleural surfaces move against each other through the respiratory cycle. How much ultrasound energy is lost – dissipated or attenuated, between each re-reflection.Ĭomet tail artefact is a short path reverberation artefact that weakens with each reverberation, resulting in a vertical echogenic artefact that rapidly fades as it continues in to the ultrasound image.The distance between the two reflective surfaces (long vs short path reverberation artefacts).The size of the two reflective surfaces.The appearance of the reverberation artefact depends on: ![]() This reverberation causes a repetitive artefact on the ultrasound image. Some of the pulse becomes caught between the two surfaces, bouncing forwards and backwards before returning in increments, between each reverberation, to the transducer. ![]() ![]() #COMET TAIL ARTIFACT SERIES#Not infrequently an ultrasound pulse encounters two parallel reflective surfaces lying perpendicular to its path. The comet-tail artifact is a case of reverberation where two closely spaced surfaces generate a series of closely spaced discrete echoes. both arms to Guillotines tail blade, Ozymandias and Comet This camping trip. When this does not occur ultrasound artefacts are created. a chance encounter leads Jaune to stumble across a strange artifact. This reverberation type of artefact occurs when there is a marked difference in acoustic impedances between an object and its surrounding.1 A 12-year-old boy presented with a short history of acute abdominal pain without vomiting and fever was studied with an abdominal ultrasound. An ultrasound machine assumes a single pulse of ultrasound enters the tissues, is reflected off a structure, and returns directly to the transducer for interpretation. The comet-tail artefact appears as a dense tapering trail of echoes just distal to a strongly reflecting structure. ![]()
0 Comments
Read More
Leave a Reply. |