scholarly journals HIGH-RESOLUTION CT FEATURES OF THE COVID-19 INFECTION, INITIALAND FOLLOW-UP CHANGES AMONG DIFFERENT CLINICAL TYPES

2020 ◽  
pp. 32-35
Author(s):  
Sachin Banthia
Keyword(s):  
High Resolution ◽  
Virus Disease ◽  
Severe Disease ◽  
Ct Scanning ◽  
High Resolution Computed Tomography ◽  
Density Score ◽  
Wide Range ◽  
Quantitative Score ◽  
Ct Features

Background: To discuss the high resolution computed tomography (HRCT) manifestations of corona virus disease 2019 (COVID-19) patients among different clinical types on initial and follow-up CT. Methods: Seventy COVID-19 patients admitted to the Affiliated Hospital of SP Medical Collage Bikaner were enrolled. All patients underwent initial and follow-up chest HRCT. The main CT features and semi-quantitative score which represent disease severity among different clinical types were evaluated. Result: On initial CT, the main abnormalities observed in common and severe cases respectively were pure ground glass opacities (GGOs) and patchy consolidation surrounded by GGOs. Critical cases had multiple consolidation surrounded by wide range of GGOs distributed in the whole lung fields. The CT severity score and density score in mild (up to 8 and 5), moderate (>8 to 15 and 9) and severe (>15 and 12) cases were increased by gradient. On follow-up CT, mild and moderate types manifested as decreasing density of lesion, absorbed consolidation and GGOs. Severe cases showed progression of the disease. The extent and progression scores in mild and moderate patients were significantly decreased, while the range score of patients with severe disease reached the highest points, accompanied with an increase in the density score. Conclusion: CT scanning can accurately assess the severity of COVID-19, and help to monitor disease transformation during follow-up among different clinical conditions.

scholarly journals Computed tomography findings in patients with H1N1 influenza A infection

2013 ◽  
Vol 46 (5) ◽  
pp. 299-306 ◽  
Author(s):  
Viviane Brandão Amorim ◽  
Rosana Souza Rodrigues ◽  
Miriam Menna Barreto ◽  
Gláucia Zanetti ◽  
Edson Marchiori
Keyword(s):  
Computed Tomography ◽  
Influenza A ◽  
H1n1 Virus ◽  
Severe Disease ◽  
H1n1 Influenza ◽  
Wall Thickening ◽  
High Resolution Computed Tomography ◽  
Air Trapping ◽  
Bronchial Wall

The present study aimed to review high resolution computed tomography findings in patients with H1N1 influenza A infection. The most common tomographic findings include ground-glass opacities, areas of consolidation or a combination of both patterns. Some patients may also present bronchial wall thickening, airspace nodules, crazy-paving pattern, perilobular opacity, air trapping and findings related to organizing pneumonia. These abnormalities are frequently bilateral, with subpleural distribution. Despite their nonspecificity, it is important to recognize the main tomographic findings in patients affected by H1N1 virus in order to include this possibility in the differential diagnosis, characterize complications and contribute in the follow-up, particularly in cases of severe disease.

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.

Long-term follow up after bony mastoid and epitympanic obliteration: radiological findings

2009 ◽  
Vol 124 (1) ◽  
pp. 37-43 ◽  
Author(s):  
J-P Vercruysse ◽  
B De Foer ◽  
T Somers ◽  
J Casselman ◽  
E Offeciers
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Canal Wall ◽  
Resonance Imaging ◽  
High Resolution Computed Tomography ◽  
Long Term Follow Up ◽  
Echo Planar ◽  
Canal Wall Up

AbstractObjective:The canal wall up bony obliteration technique lowers the incidence of recurrent cholesteatoma, but carries the potential risk of obliterating residual cholesteatoma. The objective of this study was to report long-term follow-up radiological findings after performing a canal wall up bony obliteration technique procedure, in order to detect residual and/or recurrent cholesteatoma.Patients:Fifty-one patients presenting with a cholesteatoma or a troublesome cavity were operated upon using the canal wall up bony obliteration technique, and were evaluated by follow-up imaging a mean of 76.4 months post-operatively (range, 53.8–113.6 months).Intervention:All patients were evaluated with high resolution computed tomography and magnetic resonance imaging (including delayed contrast, T1-weighted imaging and non-echo-planar, diffusion-weighted imaging).Results:Imaging revealed the presence of one residual, one recurrent and one congenital petrosal apex cholesteatoma. On high resolution computed tomography, completely obliterated mastoid filled with bone was observed in 74.5 per cent (38/51) of patients, and an aerated middle-ear cavity in 64.7 per cent (33/51). High resolution computed tomography clearly detected any associated soft tissue present in the middle-ear cavity (18/51) and in the obliterated mastoids (13/51), but could not characterise this tissue. Non-echo-planar, diffusion-weighted magnetic resonance imaging clearly identified all three cholesteatomas, and differentiated them from other associated soft tissues. No cholesteatoma was found within the obliterated mastoids.Conclusion:Long-term follow up indicated that the canal wall up bony obliteration technique is a safe method with which to treat primary and recurrent cholesteatoma and to reconstruct unstable cavities. Soft tissue was found quite often in the middle ear and obliterated mastoids. High resolution computed tomography identified its presence but could not further characterise it. However, non-echo-planar, diffusion-weighted magnetic resonance imaging succeeded in differentiating soft tissues, enabling detection of residual or recurrent cholesteatoma after a canal wall up bony obliteration technique procedure.

Longitudinal Follow-up Study of Smoking-induced Lung Density Changes by High-resolution Computed Tomography

2000 ◽  
Vol 161 (4) ◽  
pp. 1264-1273 ◽  
Author(s):  
KENZO SOEJIMA ◽  
KAZUHIRO YAMAGUCHI ◽  
EIICHI KOHDA ◽  
KEI TAKESHITA ◽  
YOKO ITO ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
High Resolution Computed Tomography ◽  
Lung Density ◽  
Follow Up Study

18F-FDG PET-CT postoperative changes after maxillectomy: Findings and pitfalls in interpretation

2021 ◽  
pp. 20200574
Author(s):  
Tima Davidson ◽  
Johnatan Nissan ◽  
Maria Krichmar ◽  
Eyal Lotan ◽  
Shai Shrot ◽  
...  
Keyword(s):  
Fdg Pet ◽  
Ct Scanning ◽  
Fdg Uptake ◽  
Postoperative Changes ◽  
Pet Ct ◽  
The Mean ◽  
Fdg Pet Ct ◽  
Mucosal Thickening ◽  
Ct Features

Objective: We investigated the findings and pitfalls of FDG-PET/CT scanning after maxillectomy with reconstruction/rehabilitation procedures, in patients with head and neck malignancies treated during nine years at one tertiary medical centre. Methods: Fourteen patients (10 males), aged 22–84 years, underwent 17 reconstruction/rehabilitation maxillectomy surgeries and 35 PET/CT scans. Postoperative PET/CT findings were correlated with clinical and imaging follow-up. Results: Increased FDG uptake, mean SUVmax 2.4 ± 1.4 (range 0.3–4.3), was observed at the postoperative bed following 12 of 17 surgeries (71%; 10 obturators, two mesh reconstructions). Following the remaining 5/17 surgeries (three with a fat flap and two without any reconstructions), abnormal FDG uptake was not observed at the postoperative bed. CT features of postoperative sites included: non-homogeneous mixed iso/hyperdense structures (hollow or filled) with multiple surrounding and/or inside air bubbles (“sponge appearance”) and mucosal thickening along the postoperative bed wall (in all cases with obturator implants); rich fat density material in reconstructions with a fat flap and in closures without reconstruction, and radiopaque elongated structures in mesh reconstructions. No correlation was found of the mean SUVmax in initial scans, with the time from the surgery date (10 ± 6 months; r=0.04, P=0.90), or with the mean SUVmax in final scans (at 25± 17 months, P=0.17). Conclusions: : Increased FDG uptake, together with corresponding non-specific CT features, may persist for a prolonged period after surgery with obturators and mesh implantations, mimicking malignancy or infection. Awareness of variations in postoperative PET-CT appearance can help avoid false interpretations and redundant invasive procedures.

High‐resolution computed tomography in healthy smokers and never‐smokers: a 6‐year follow‐up study of men born in 1933

2004 ◽  
Vol 45 (1) ◽  
pp. 44-52 ◽  
Author(s):  
J. Vikgren ◽  
M. Boijsen ◽  
K. Andelid ◽  
A. Ekberg‐Jansson ◽  
S. Larsson ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
High Resolution Computed Tomography ◽  
Follow Up Study ◽  
Never Smokers

Otosclerosis: Incidence of Positive Findings on High-Resolution Computed Tomography and Their Correlation to Audiological Test Data

2005 ◽  
Vol 114 (9) ◽  
pp. 709-716 ◽  
Author(s):  
Ilka C. Naumann ◽  
Beat Porcellini ◽  
Ugo Fisch
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Sodium Fluoride ◽  
Bone Conduction ◽  
Ct Scanning ◽  
Ct Scans ◽  
High Resolution Computed Tomography ◽  
Computed Tomographic ◽  
Mixed Hearing Loss ◽  
Temporal Bone Ct

Objectives: Computed tomographic (CT) scanning with slices of 1 mm or more has not been sufficient to demonstrate otosclerotic foci in most cases to date. Methods: We investigated the validity of CT scans with a 0.5-mm cubical scan technique, with and without planar reconstruction, and correlated these findings with audiological data. Forty-four temporal bone CT scans from 30 patients with conductive or mixed hearing loss were evaluated. Results: Otosclerotic foci were visualized in 74% of the cases. With reconstruction at the workstation, the sensitivity increased to 85%. Whereas in fenestral otosclerosis a correlation was found between the size of the focus and the air-bone gap, no correlation was seen between the size of the focus and bone conduction thresholds with cochlear involvement. Otosclerotic foci in patients treated with sodium fluoride were smaller than those in patients without treatment. This finding may indicate a beneficial effect of sodium fluoride on otosclerotic growth. Conclusions: High-resolution CT scans are a valid tool that can be used to confirm, localize, and determine the size of clinically suspected otosclerotic foci.

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