Comparative study of 3 exophthalmometers and computed tomographic biometry

2018 ◽  
Vol 28 (2) ◽  
pp. 144-149 ◽  
Author(s):  
Juliette Delmas ◽  
Jean-Marie Loustau ◽  
Sylvain Martin ◽  
Loïc Bourmault ◽  
Jean-Paul Adenis ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Axial Length ◽  
Intraclass Correlation ◽  
Great Accuracy ◽  
Graves Disease ◽  
Interobserver Reproducibility ◽  
Computed Tomographic ◽  
Cerebral Computed Tomography

Purpose: Accurate and reproducible exophthalmometry is mandatory to diagnose and follow-up orbital patients, especially in Graves disease. However, many variations are described among the different commercially available exophthalmometers. Methods: Sixty patients, who underwent a cerebral computed tomography (CT) scan, were included. External prebicanthal segments (EPBCS) for right and left eyes (RE and LE), interorbital distance, and globe axial length were recorded by a first observer (O1), more experienced than a second (O2). Intraobserver and interobserver reproducibility were evaluated, using intraclass correlation coefficient (ICC) and Bland and Altman plots. Results: Concordance between each EPBCS measurement for each eye and CT scan biometry was moderate for the Luedde ruler for the 2 observers. For the Hertel exophthalmometer, concordance was moderate for O1 in the 2 eyes and moderate in RE but good in LE for O2. For the Mourits exophthalmometer, this concordance was very good in RE and good in LE for O1, and good whatever the eye for O2. Intraobserver (ICC varying from 0.75 to 0.95 for the 2 observers) and interobserver (ICC from 0.69 to 0.94) reproducibility were high, especially for the Mourits exophthalmometer. Bland and Altman plots showed underestimations when using the Luedde ruler, overestimations when using the Hertel exophthalmometer, and overestimation of small values and underestimation of high values when using the Mourits exophthalmometer when compared to CT scan biometry. Conclusions: We demonstrated great accuracy to CT scan biometry with 1-prism Mourits exophthalmometer, low accuracy with the Luedde instrument, and intermediate accuracy with the Hertel exophthalmometer, with fair intraobserver and interobserver reproducibility.

Changes in Apposition of Endograft Limbs in the Iliac Arteries After Endovascular Aneurysm Repair: Determination With New Computed Tomography–Applied Software

2019 ◽  
Vol 26 (6) ◽  
pp. 843-852 ◽  
Author(s):  
Seline R. Goudeketting ◽  
Richte C. L. Schuurmann ◽  
Cornelis H. Slump ◽  
Jean-Paul P. M. de Vries
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Interobserver Agreement ◽  
Intraclass Correlation ◽  
Endovascular Aneurysm Repair ◽  
Accurate Analysis ◽  
Applied Software ◽  
Aneurysm Repair ◽  
And Control

Purpose: To validate new computed tomography (CT)–applied software used to determine endograft limb position and apposition after endovascular aneurysm repair (EVAR). Materials and Methods: Twelve EVAR patients (mean age 81±6 years; 10 men) with distal stent-graft extensions for 15 (3 bilateral) type Ib endoleaks during follow-up were selected based on the availability of the following CT studies: pre-EVAR, 1 month, and the penultimate scan prior to the scan disclosing the type Ib endoleak. Twelve patients (mean age 82±7 years; 11 men) without endoleak and a similar interval between the primary EVAR procedure and the penultimate CT scan of the endoleak group were selected as controls using measurements from both endograft limbs (n=21, 3 excluded). Prototype Vascular Imaging Analysis software was adapted to calculate 6 parameters for the distal apposition zone: fabric distance, shortest apposition length, endograft diameter, iliac seal surface (ISS), iliac endograft apposition surface (IEAS), and percentage of iliac surface coverage (IEAS/ISS × 100). Measurements were performed on the preoperative, first postoperative, and penultimate/matched follow-up CT scans. Interobserver variability was assessed with the intraclass correlation coefficient (ICC). Continuous data are presented as the median [interquartile range (IQR) Q1, Q3]. Results: CTA follow-up was not significantly different between the endoleak and control groups [30 months (IQR 18, 58) vs 36 months (IQR 21, 59), p=0.843]. Interobserver agreement was good to excellent for all parameters (ICC 0.879–0.985). Preoperative anatomy and endograft dimensions on the first follow-up CTA scan did not differ significantly between the groups. When the penultimate CTA scan was compared with the first postoperative CT scan, endograft dimensions had significantly changed in the endoleak group; importantly, apposition was significantly decreased, and fabric distance was significantly increased, indicating limb retraction. Differences in changes in endograft dimensions were significant between the groups. Conclusion: New CT-applied software was introduced to visualize apposition and position changes of endograft limbs during follow-up. The software demonstrated good-to-excellent interobserver agreement and enabled accurate analysis of post-EVAR endograft dimensions. Significant changes in apposition and position were observed with the software on the penultimate CT scan prior to diagnosis of type Ib endoleak.

scholarly journals Computed Tomography and Bronchoscopy in Endobronchial Tuberculosis

2003 ◽  
Vol 10 (8) ◽  
pp. 445-448 ◽  
Author(s):  
Halil Yanardag ◽  
Cüneyt Tetikkurt ◽  
Seza Tetikkurt ◽  
Sabriye Demirci ◽  
Tuncer Karayel
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Therapeutic Response ◽  
Histopathological Examination ◽  
Computed Tomographic ◽  
Before And After ◽  
Endobronchial Tuberculosis ◽  
Age Range

BACKGROUND: The therapeutic response to endobronchial tuberculosis is usually evaluated by bronchoscopy. Currently, there are no published studies investigating the use of computed tomography for the evaluation of therapeutic response in endobronchial tuberculosis.OBJECTIVE: A retrospective study was performed to evaluate the bronchoscopic and computed tomographic features of endobronchial tuberculosis before and after treatment. The aim of this study was to investigate the usefulness of computed tomography for the assessment of treatment.METHODS: The clinical, pathological and bronchoscopic features of endobronchial tuberculosis were evaluated in 55 patients. The age range of the patients was 21 to 52 years. Computed tomography and bronchoscopy were performed before and after treatment.RESULTS: Diagnosis of tuberculosis was confirmed by culture and histopathological examination. Bronchoscopic examination revealed 89 endobronchial lesions of various types in 55 patients. The exudative type was the most common. Follow-up bronchoscopy revealed that exudative-, ulcerative- and granular-type lesions healed completely. Computed tomography performed after treatment correlated well with the follow-up bronchoscopic findings.CONCLUSION: The results suggest that follow-up computed tomography is useful for the evaluation of therapeutic response and complications associated with endobronchial tuberculosis, and may replace bronchoscopy.

scholarly journals Temporal lung changes in high-resolution chest computed tomography for coronavirus disease 2019

2020 ◽  
Vol 48 (9) ◽  
pp. 030006052095099
Author(s):  
Chengyang Chen ◽  
Xing Wang ◽  
Jia Dong ◽  
Dianer Nie ◽  
Qianlan Chen ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Type I ◽  
Type Ii ◽  
High Resolution Computed Tomography ◽  
Computed Tomographic ◽  
Reticular Pattern ◽  
Ct Radiation ◽  
Diffuse Distribution

Objective To evaluate temporal lung changes in coronavirus disease 2019 (COVID-19) in high-resolution computed tomography (HRCT) and to determine the appropriate computed tomographic (CT) follow-up time. Methods Eighty-six patients with two or more HRCT scans who were diagnosed with COVID-19 were included. The CT score and major CT findings were evaluated. Results Eighty-two (95.3%) patients had lesions on the initial HRCT scans. Most scans showed bilateral, multifocal lung lesions, with multiple lobes involved and diffuse distribution. For fifty-seven patients with type I (progress compared with the initial CT score), the CT score reached a peak at 12 days and the nadir at 36 days. For twenty-nine patients with type II (no progress compared with the initial CT score), the lowest CT score was reached at 23 days. On the final HRCT scans (>21 days), patients with a reticular pattern were older than those without a reticular pattern. Conclusion The appropriate follow-up time of CT scans is during the second week (approximately 12 days) and the fourth to fifth weeks (approximately 23–36 days) from the onset of illness. These times could help reduce the CT radiation dose and show timely changes in the course of the disease by CT.

scholarly journals A Protocol to Reduce Interobserver Variability in the Computed Tomography Measurement of Orbital Floor Fractures

2015 ◽  
Vol 8 (4) ◽  
pp. 289-298 ◽  
Author(s):  
ChuanHan Ang ◽  
JinRong Low ◽  
JiaYi Shen ◽  
Elijah Zheng Yang Cai ◽  
Eileen Chor Hoong Hing ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Surface Area ◽  
Interobserver Variability ◽  
Intraclass Correlation ◽  
Orbital Floor ◽  
Orbital Fracture ◽  
Orbital Fractures ◽  
Fracture Detection ◽  
Orbital Floor Fractures

Orbital fracture detection and size determination from computed tomography (CT) scans affect the decision to operate, the type of surgical implant used, and postoperative outcomes. However, the lack of standardization of radiological signs often leads to the false-positive detection of orbital fractures, while nonstandardized landmarks lead to inaccurate defect measurements. We aim to design a novel protocol for CT measurement of orbital floor fractures and evaluate the interobserver variability on CT scan images. Qualitative aspects of this protocol include identifying direct and indirect signs of orbital fractures on CT scan images. Quantitative aspects of this protocol include measuring the surface area of pure orbital floor fractures using computer software. In this study, 15 independent observers without clinical experience in orbital fracture detection and measurement measured the orbital floor fractures of three randomly selected patients following the protocol. The time required for each measurement was recorded. The intraclass correlation coefficient of the surface area measurements is 0.999 (0.997–1.000) with p-value < 0.001. This suggests that any observer measuring the surface area will obtain a similar estimation of the fractured surface area. The maximum error limit was 0.901 cm2 which is less than the margin of error of 1 cm2 in mesh trimming for orbital reconstruction. The average duration required for each measurement was 3 minutes 19 seconds (ranging from 1 minute 35 seconds to 5 minutes). Measurements performed with our novel protocol resulted in minimal interobserver variability. This protocol is effective and generated reproducible results, is easy to teach and utilize, and its findings can be interpreted easily.

Cerebral Gliosarcomas: Correlation of Computed Tomographic Findings, Surgical Aspect, Pathological Features, and Prognosis

Neurosurgery ◽  
1990 ◽  
Vol 26 (2) ◽  
pp. 261-267 ◽  
Author(s):  
Francesco Maiuri ◽  
Lucio Stella ◽  
Dino Benvenuti ◽  
Arcangelo Giamundo ◽  
Guido Pettinato
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Contrast Enhancement ◽  
Prolonged Survival ◽  
Pathological Features ◽  
Sarcomatous Component ◽  
Computed Tomographic ◽  
Ct Findings ◽  
Ct Finding

Abstract The cases of 5 patients with cerebral gliosarcomas examined by computed tomography are reported and the correlations among the computed tomographic (CT) findings, the surgical and histological aspects, and the prognosis are discussed. In some patients, these tumors appear on CT scan as intracerebral lesions, with large necrotic areas and peripheral contrast enhancement; this CT aspect, similar to that of glioblastomas, corresponds to a diffusely infiltrating growth of the tumor and the prevalence of a gliomatous component. In other patients, the tumor appears on the CT scan as a hyperdense mass with well-defined margins and homogenous contrast enhancement;; this CT finding, which may mimic that of a meningioma, corresponds to a rather well-demarcated surgical aspect and the prevalence of sarcomatous component. In our series, we have also noticed a more prolonged survival in a patient with a CT aspect that suggested a meningioma and prevalence of the sarcomatous component.

scholarly journals Aural Myiasis, a Rare Cause of Earache

2015 ◽  
Vol 2015 ◽  
pp. 1-3 ◽  
Author(s):  
Ibrahim Al Jabr
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Middle Ear ◽  
Larval Stage ◽  
Tympanic Membrane Perforation ◽  
Tropical Regions ◽  
Warm Weather ◽  
Membrane Perforation ◽  
Good Environment

Myiasis of the ear is an infestation of the ear by maggots (the larval stage of flies). In the literature, there are only few cases reported about aural myiasis. It is more common to occur in tropical regions, where humidity and warm weather provide a good environment for this infestation. In this paper, a 12-year-old boy is reported to have unilateral earache for 3-day duration. Examination of the painful ear showed a tympanic membrane perforation with larvae (maggots) in the middle ear. They were removed by using a forceps and gentle irrigation of ear to expel any remnant. Further management included assessment of hearing, computed tomography (CT) scan, and outpatient follow-up.

scholarly journals Predictors of Seizure Recurrence in Solitary Calcified Neurocysticercosis in Relation to Computed Tomography Scan: Prospective Observational Study

2021 ◽  
Vol 11 (2) ◽  
pp. 120-126
Author(s):  
Shinu Singla ◽  
Ravindra K Garg ◽  
Rajesh Verma ◽  
Hardeep S Malhotra ◽  
Imran Rizvi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ct Scan ◽  
Univariate Analysis ◽  
Morphological Characteristics ◽  
Common Finding ◽  
Seizure Recurrence ◽  
Perilesional Edema ◽  
Increased Risk ◽  
Ct Head

Background and Purpose: Solitary calcified neurocysticercosis (NCC) on the computed tomography (CT) scan of brain in patients of epilepsy is common finding in endemic regions. Factors causing seizures in such cases are debatable. Immature calcification may be the causative factor for seizure recurrence. Thus, we aimed to study predictors of seizure recurrence specific to morphological characteristics on CT scan.Methods: Patients with solitary calcified NCC on CT scan brain and active seizures were prospectively included. The protocol included clinical evaluation, contrast-enhanced CT scan of the brain, and electroencephalogram (EEG) at baseline and 9th month of 1-year follow-up in all patients. Seizure recurrence after 1 week of enrolment was recorded.Results: One hundred twenty patients with a mean age of 23.33±12.81 years were included with a final follow-up of 109 patients and 35 patients had seizure recurrence. On univariate analysis, seizure frequency of more than 1 episode/month (45.7% vs. 25.7%, p=0.037; odds ratio [OR], 2.06; 95% confidence interval [CI], 1.05-5.68), perilesional edema on CT head (45% vs. 10.8%, p<0.001; OR, 6.95; 95% CI, 2.58-18.7), lower density (HU) of lesion on CT head (139.85±76.54 vs. 204.67±135.9 HU p=0.009) and abnormal EEG at presentation (p<0.001; OR, 18.25; 95% CI, 2.15-155.13) were significantly associated with seizure recurrence. On multivariate analysis, presence of perilesional edema on CT head (p=0.001; OR, 6.854; 95% CI, 2.26-20.77), density of lesion on CT (HU) (p=0.036; OR, 0.995; 95% CI, 0.99-1) and abnormal EEG (p=0.029; OR, 12.125; 95% CI, 1.29-113.74) were independently associated with seizure recurrence.Conclusions: The presence of perilesional edema, HU of calcification on CT brain, and abnormal EEG suggest an increased risk of seizure recurrence in patients of epilepsy with solitary calcified NCC.

Computed Tomographic Findings Characteristic for Encapsulating Peritoneal Sclerosis: A Case-Control Study

2009 ◽  
Vol 29 (5) ◽  
pp. 517-522 ◽  
Author(s):  
Anniek Vlijm ◽  
Jaap Stoker ◽  
Shandra Bipat ◽  
Anje M. Spijkerboer ◽  
Saffire S.K.S. Phoa ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Peritoneal Dialysis ◽  
Ct Scan ◽  
Case Control Study ◽  
Case Control ◽  
Ct Scans ◽  
Computed Tomographic ◽  
Ct Findings ◽  
Control Study

Background Computed tomography (CT) is often used to confirm the diagnosis of encapsulating peritoneal sclerosis (EPS) but there is no consensus on specific CT abnormalities. To establish CT findings characteristic for EPS, we compared CT findings between EPS patients and long-term peritoneal dialysis (PD) patients without EPS. Methods We included as cases all EPS patients in our center from 1996 to 2008 that underwent a CT scan at the time of diagnosis. Controls were all other long-term PD patients (PD duration ≥ 4 years) without EPS that had a CT scan for different reasons. The CT scans were blindly and independently reviewed by 3 radiologists: 2 abdominal radiologists with PD knowledge (Observers 1 and 2) and 1 radiologist without PD experience (Observer 3). Results We included 15 EPS patients and 16 controls. Observer 1 found 6 CT findings that were significantly more often present in EPS than in controls ( p ≤ 0.05): peritoneal enhancement, thickening, and calcifications; adhesions of bowel loops; signs of obstruction; and fluid loculation/septation. Observer 2 scored almost identically but Observer 3 scored differently. The sensitivity and specificity of a combination of specific CT findings were, respectively, 100% and 94% for Observers 1 and 2, and 79% and 88% for Observer 3. Conclusion CT scans showed characteristic abnormalities that were significantly more often present in EPS patients compared to long-term PD control patients. CT can be used to confirm the diagnosis of EPS when experienced radiologists apply a combination of specific CT findings.

scholarly journals Multiplanar reformation computed tomography for carpal malalignment

2019 ◽  
Vol 44 (10) ◽  
pp. 1049-1055
Author(s):  
Philip M. J. Schormans ◽  
Judith P. M. Schots ◽  
René E. Weijers ◽  
Daan V. Loeffen ◽  
Martijn Poeze ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Axial Length ◽  
Complex Geometry ◽  
Scaphoid Fracture ◽  
Intraclass Correlation ◽  
Average Intensity ◽  
Multiplanar Reformation ◽  
Level Of Evidence ◽  
Reliable Technique ◽  
Average Intensity Projection

Correct interpretation of scaphoid axial length and carpal malalignment is difficult owing to the complex geometry of the scaphoid. Traditional measurements, such as the scapholunate angle and radiolunate angle, have shown limited reproducibility. To improve the assessment of these measurements, we used multiplanar reformation computed tomography with added average intensity projection. Four measurements for scaphoid morphology and carpal alignment were independently measured by four observers on computed tomography scans of 39 consecutive patients who were treated conservatively for scaphoid fracture. Fleiss’s kappa for categorical results showed substantial agreement for the measurements of the scapholunate and radiolunate angles. Intraclass correlation coefficients were significant for measurements of the axial length, scapholunate angle and radiolunate angle. Our results suggest that multiplanar reformation computed tomography with added average intensity projection is a reliable technique for assessment of scaphoid morphology and carpal alignment. Level of evidence: II

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