scholarly journals Endoscopic Diagnosis and Treatment of a Case of Respiratory Papillomatosis

1997 ◽  
Vol 3 (3) ◽  
pp. 183-187 ◽  
Author(s):  
T. Hirano ◽  
C. Konaka ◽  
S. Okada ◽  
H. Shibanuma ◽  
E. Shimizu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Malignant Transformation ◽  
Therapeutic Strategy ◽  
Helical Ct ◽  
Diagnosis And Treatment ◽  
Helical Computed Tomography ◽  
Laryngeal Papilloma ◽  
Yag Laser ◽  
Recurrent Lesion ◽  
Rare Lesion

Respiratory papilloma is a rare lesion that arises in the larynx, trachea and bronchus. We describe a patient with laryngeal papilloma that spread to the trachea and which was effectively treated by Nd-YAG laser. Two years after the initial treatments of the laryngeal and tracheal papillomas, a recurrent lesion (solitary papilloma) was observed on the membranous portion of the trachea. We examined the recurrent lesion by bronchoscopy including bronchoscopic ultrasound (US), helical computed tomography (CT) and tracheal biopsies. Respiratory papillomatosis sometimes shows either malignant transformation or invasion to tracheal wall without displaying cytohistological atypia. Therefore, we concluded that bronchoscopic US and helical CT were useful for deciding on therapeutic strategy in cases of recurrence of tracheal papilloma.

scholarly journals 257 A New Procedure and Concept of Helical Computed Tomography Dose Index (HTDI) in Dosimetry of Helical CT

1995 ◽  
Vol 51 (10) ◽  
pp. 1328
Author(s):  
Yoshihisa Muramatsu ◽  
Noriko Akiyama ◽  
Kouzou Hanai ◽  
Yasuyuki Fujita ◽  
Syuichi Katsuta
Keyword(s):  
Computed Tomography ◽  
Helical Ct ◽  
Helical Computed Tomography ◽  
Computed Tomography Dose Index ◽  
Dose Index

Utility of Helical Computed Tomography in the Study of Arytenoid Dislocation and Arytenoid Subluxation

1997 ◽  
Vol 106 (12) ◽  
pp. 1020-1023 ◽  
Author(s):  
George D. Lyons ◽  
Daniel W. Nuss ◽  
Albert E. Alexander ◽  
Mary A. Fazekas-May ◽  
Lisa David ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Direct Laryngoscopy ◽  
Helical Ct ◽  
Helical Computed Tomography ◽  
Radiographic Examination ◽  
Major Difficulty ◽  
Multiplanar Reconstructions ◽  
Arytenoid Dislocation ◽  
Arytenoid Subluxation

Conventional computed tomography (CT) has been considered a mainstay in the evaluation of the larynx. A major difficulty with utilizing this modality, especially in the study of the arytenoid, is the time necessary to perform a thin-slice examination through a structure that has a propensity to move with respiration and swallowing. Helical CT not only significantly reduces the time necessary to study the larynx, but enables one to perform multiple high-resolution multiplanar reconstructions. Eleven patients with arytenoid abnormalities documented by strobovideolaryngoscopy or direct laryngoscopy were imaged with helical CT. A comprehensive radiographic examination illustrating the cricoarytenoid relationship in all of the subjects was completed in less than 20 seconds by using axial reconstructions in 2-mm-thick slices at 1-mm intervals, with subsequently derived sagittal and coronal reconstructions. Helical CT may be a useful adjunct in the diagnosis of arytenoid subluxation or dislocation.

Stress Radiography and Stress Examination of the Talocrural and Subtalar Joint on Helical Computed Tomography

1997 ◽  
Vol 18 (8) ◽  
pp. 482-488 ◽  
Author(s):  
F.J. van Hellemondt ◽  
J.W.K. Louwerens ◽  
E.S. Sijbrandij ◽  
A.P.G. van Gils
Keyword(s):  
Computed Tomography ◽  
Subtalar Joint ◽  
Facet Joint ◽  
Three Dimensional ◽  
Helical Ct ◽  
Helical Computed Tomography ◽  
Chronic Instability ◽  
Significant Difference ◽  
Subtalar Instability ◽  
Stress Examination

The main objective of this study was to compare subtalar inversion stress views using the Brodén view with inversion stress views on helical computed tomography (CT). One of the drawbacks of routine radiography is the imaging of three-dimensional structures in a two-dimensional plane. We investigated whether the use of helical CT would lead to a more objective and clearer measurable method to determine the amount of tilt in the subtalar joint. A group of 15 patients with unilateral chronic instability complaints and clinically suspected subtalar instability was examined. The contralateral asymptomatic foot was used as control. A variable amount of subtalar tilt (range, 4° to 18°) was demonstrated in all cases on stress radiographs, without finding significant difference between the symptomatic and asymptomatic feet. However, contrary to the findings at the talocrural level, subtalar tilt was found in none of the patients using helical CT. Thus, we now doubt that the tilt seen during stress examination using the Brodén view is the true amount of tilt. It may be that the lateral opening, seen on these radiographs, largely results from imaging two planes that have made a translatory and rotatory movement relative to each other in an oblique direction. It is concluded that the Brodén stress examination might not be useful for screening patients with subtalar instability. Associated anomalies not visible on the radiographs were detected by helical CT. In four cases, narrowing of the articular cartilage and irregular and hypertrophic bone formation at the middle facet joint of the subtalar joints were found. It is likely that these changes cause disturbance of function of this joint and it is suggested that the subjective complaint of instability with “giving way” is not only caused by hypermobility, but can be caused by other disturbances of normal motion.

Three-dimensional imaging of ENT diseases with helical computed tomography

1996 ◽  
Vol 110 (6) ◽  
pp. 604-608 ◽  
Author(s):  
Hideki Muraoka ◽  
Atsunobu Tsunoda ◽  
Masahiro Kojima ◽  
Hisashi Tokano ◽  
Atsushi Komatsuzaki
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Helical Ct ◽  
Diagnostic Value ◽  
Helical Computed Tomography ◽  
Middle Ear Surgery ◽  
Ear Surgery ◽  
Vocal Fold Palsy ◽  
Maxillary Fracture ◽  
Nose And Throat

AbstractWe have employed helical computed tomography (CT) to evaluate ear, nose and throat diseases, and present herein seven typical cases: middle ear surgery, osteoma of the external ear canal, maxillary fracture, tripod fracture, submandibular gland calculus, epiglottic abscess and vocal fold palsy. Helical (CT) facilitates the assessment of these diseases and its high diagnostic value is described.

Screening for Lung Cancer With Low-Dose Helical Computed Tomography: Anti-Lung Cancer Association Project

2002 ◽  
Vol 20 (4) ◽  
pp. 911-920 ◽  
Author(s):  
Tomotaka Sobue ◽  
Noriyuki Moriyama ◽  
Masahiro Kaneko ◽  
Masahiko Kusumoto ◽  
Toshiaki Kobayashi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Low Dose ◽  
Helical Ct ◽  
Helical Computed Tomography ◽  
Tumor Diameter ◽  
Sputum Cytology ◽  
X Ray ◽  
Chest X Ray ◽  
Stage Ia

PURPOSE: Because efficacy of lung cancer screening using chest x-ray is controversial and insufficient, other screening modalities need to be developed. To provide data on screening performance of low-dose helical computed tomography (CT) scanning and its efficacy in terms of survival, a one-arm longitudinal screening project was conducted. PATIENTS AND METHODS: A total of 1,611 asymptomatic patients aged 40 to 79 years, 86% with smoking history, were screened by low-dose helical CT scan, chest x-ray, and 3-day pooled sputum cytology with a 6-month interval. RESULTS: At initial screening, the proportions of positive tests were 11.5%, 3.4%, and 0.8% with low-dose helical CT scan, chest x-ray, and sputum cytology, respectively. In 1,611 participants, 14 (0.87%) cases of lung cancer were detected, with 71% being stage IA disease and a mean tumor diameter of 19.8 mm. At repeated screening, the proportions of positive tests were 9.1%, 2.6%, and 0.7% with low-dose helical CT, chest x-ray, and sputum cytology, respectively. In 7,891 examinations, 22 (0.28%) cases of lung cancer were detected, with 82% being stage IA disease and a mean tumor diameter of 14.6 mm. The 5-year survival rate for screen-detected lung cancer was 76.2% and 64.9% for initial and repeated screening, respectively. CONCLUSION: Screening with low-dose helical CT has potential to improve screening efficacy in terms of reducing lung cancer mortality. An evaluation of efficacy using appropriate methods is urgently required.

Effect of age on the performance of single detector helical computed tomography in suspected pulmonary embolism

2004 ◽  
Vol 91 (02) ◽  
pp. 296-299 ◽  
Author(s):  
Henri Bounameaux ◽  
Arnaud Perrier ◽  
Marc Righini
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Diagnostic Yield ◽  
Helical Ct ◽  
Helical Computed Tomography ◽  
Suspected Pulmonary Embolism ◽  
Predictive Values ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

SummaryThe prevalence of pulmonary embolism increases with age, but reduces the diagnostic yield of ventilation-perfusion lung scan age. Helical computed tomography (hCT) is widely used to diagnose pulmonary embolism, and should be less susceptible to the influence of age. We studied the influence of age on the performance of hCT to verify that hypothesis. We analyzed a database of 299 consecutive outpatients suspected of pulmonary embolism, in whom pulmonary embolism was diagnosed according to accepted criteria, and who were all submitted to a helical CT. We divided the patient population into tertiles, corresponding to the following age categories: less than 59 years (group 1), 60 to 75 years (group 2), and over 75 years (group 3). Sensitivity and specificity of hCT were calculated in each age category. Overall sensitivity was 70% (95% CI: 62 to 78) and specificity was 91% (95% CI: 86 to 95). Sensitivity was 81% (95% CI: 64 to 93) in group 1, 63% (95% CI: 46 to 78) in group 2, and 67 % (95% CI: 52 to 80) in group 3.The corresponding values for specificity were 92% (95% CI: 82 to 97) in group 1, 86% (95% CI: 75 to 94) in group 2 and 96% (95% CI: 87 to 100) in group 3. Positive predictive values ranged from 75% to 94% and negative predictive values from 77% to 94%. Our data suggest that age does not have a marked influence on the diagnostic performances of hCT in clinically suspected pulmonary embolism.

Diagnosis, management and mortality in acute aortic syndrome: results of the Spanish Registry of Acute Aortic Syndrome (RESA-II)

2016 ◽  
Vol 7 (7) ◽  
pp. 602-608 ◽  
Author(s):  
Arturo Evangelista ◽  
José Manuel Rabasa ◽  
Victor X Mosquera ◽  
Antonio Barros ◽  
Ruben Fernández-Tarrio ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Surgical Treatment ◽  
Therapeutic Strategy ◽  
Geographical Area ◽  
Diagnostic Technique ◽  
Type A ◽  
Diagnosis And Treatment ◽  
Acute Aortic Syndrome ◽  
Type B ◽  
Tertiary Hospitals

Background: Recent advances in the diagnosis and treatment of acute aortic syndrome should improve the outcome of this disease. The Spanish Registry of Acute Aortic Syndrome aimed to assess current results in acute aortic syndrome management in a wide cohort of hospitals in the same geographical area. Methods: From January 2012 to January 2014, 26 tertiary hospitals included 629 consecutive patients with acute aortic syndrome: 73% men, mean age 64.7±14 years (range 22–92), 443 type A (70.4%) and 186 type B (29.6%). Results: Time elapsed between symptom onset and diagnosis was <12 hours in 70.7% of cases and <24 hours in 84.0% (median 5 hours; 25th–75th percentiles, 2.7–15.5 hours). Computed tomography was the first diagnostic technique in 78% of patients and transthoracic echocardiography in 15%. Surgical treatment was indicated in 78.3% of type A acute aortic syndrome. The interval between diagnosis and surgery was 4.8 hours (quartile 1–3, 2.5–11.4 hours). Among the patients with type B acute aortic syndrome, treatment was medical in 116 cases (62.4%), endovascular in 61 (32.8%) and surgical in nine (4.8%). Type A mortality during hospitalisation was 25.1% in patients treated surgically and 68% in those treated medically. Mortality in type B was 13.8% in those with medical treatment, 18.0% with endovascular therapy and 33.0% with surgical treatment. Conclusion: Improvements in the diagnosis and treatment of acute aortic syndrome have not resulted in a significant reduction in hospital mortality. The results of this study reflect more overall and less selected information on acute aortic syndrome management and the need for sustained advances in the therapeutic strategy of acute aortic syndrome.

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