Computed Tomography of the Submandibular Salivary Glands

1987 ◽  
Vol 28 (6) ◽  
pp. 693-696 ◽  
Author(s):  
S. G. Larsson ◽  
R. B. Lufkin ◽  
L. A. Hoover
Keyword(s):  
Computed Tomography ◽  
Salivary Glands ◽  
Normal Subjects ◽  
Normal Group ◽  
Platysma Muscle ◽  
Submandibular Duct ◽  
Submandibular Salivary Glands ◽  
Specific Finding ◽  
Relationship Of ◽  
The Relationship

Computed tomography offers a convenient method for the evaluation of the submandibular salivary glands and their surroundings. Normal measurements were established based on 38 normal subjects. The visualization of the ductal system in the gland and the relationship of the gland to the platysma muscle were recorded. The CT scans of 12 patients with a tongue base carcinoma and 4 patients with a verified obstruction of the submandibular duct were also reviewed to establish how the glands are affected by extrinsic lesions. The normal glands measured 28×18 mm (±5 mm) in the axial plane. Two patients with unilateral hypoplasia of the gland were found in the normal group. Visualization of the intraglandular duct is not a specific finding since it was observed in more than 25 per cent of the normal group. Displacement and bulging of the platysma muscle by the submandibular gland can be a sign of glandular enlargement. It was also seen in 9 out of 12 patients with carcinoma of the base of the tongue.

The Relationship of Root Mean Square Value of Electromyography and Isometric Torque of Quadriceps in Normal Subjects

2016 ◽  
Vol 26 (1) ◽  
pp. 58
Author(s):  
Qiurong XIE ◽  
Zheng JIANG ◽  
Qinglu LUO ◽  
Jie LIANG ◽  
Xiaoling WANG ◽  
...  
Keyword(s):  
Root Mean Square ◽  
Normal Subjects ◽  
Mean Square ◽  
Isometric Torque ◽  
Relationship Of ◽  
The Relationship

scholarly journals Unusual Deviation of the Main Foramen from the Root Apex

2016 ◽  
Vol 27 (5) ◽  
pp. 589-591 ◽  
Author(s):  
Marco Aurélio Versiani ◽  
Hany Mohamed Aly Ahmed ◽  
Manoel Damião de Sousa-Neto ◽  
Gustavo De-Deus ◽  
Paul Michael Howell Dummer
Keyword(s):  
Computed Tomography ◽  
Short Communication ◽  
Root Apex ◽  
Micro Computed Tomography ◽  
Tooth Type ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Substantial Distance

Abstract The relationship of the main foramen to the anatomic root apex has been the subject of several studies. Although they are anatomically close, they rarely coincide, and their distance can vary according to age or tooth type, ranging from 0.2 to 3.0 mm. The aim of this short communication was to evaluate the distance between the main foramen of independent middle mesial canals (MMCs) and the anatomical mesial root apex of mandibular first molars using the micro-computed tomography. Twenty-five mandibular first molars with MMCs were scanned (resolution of 9.9 µm), and the distance from its main foramen to the anatomical apex was evaluated. Overall, the distance ranged from 0.2 to 2.4 mm; however, in 3 specimens the distance was greater than 3 mm. This report demonstrates that the exit of the main foramen of the MMC varies considerably and could approach a substantial distance from the anatomical apex greater than previously reported in the literature.

scholarly journals Clinical and laboratory observations on serum folate-binding protein

Blood ◽  
1975 ◽  
Vol 46 (4) ◽  
pp. 599-609 ◽  
Author(s):  
ER Eichner ◽  
CJ Paine ◽  
VL Dickson ◽  
MD Jr Hargrove
Keyword(s):  
Binding Protein ◽  
Elevated Serum ◽  
Normal Subjects ◽  
Serum Levels ◽  
Serum Folate ◽  
Folate Level ◽  
Folate Binding Protein ◽  
Serum Folate Level ◽  
Relationship Of ◽  
The Relationship

Abstract We studied the effect of serum folate-binding protein (FBP) on folate radioassays and the relationship of the serum level of unsaturated FBP to the serum folate level in various clinical states. Our modification of a heat-extracted radioassay was compared to a whole serum radioassay. Our results confirmed the existence of elevated serum levels of unsaturated FBP in some normal subjects, in some women taking oral contraceptives, and in most patients with uremia. Elevated levels of unsaturated FBP will produce falsely low results in folate radioassay unless the FBP has been destroyed by heat, as was done in the modified radioassay here presented. In normal and uremic subjects, serum folate and unsaturated FBP levels tended to correlate, whereas in patients taking large doses of folic acid the level of unsaturated FBP fell as the level of serum folate rose.

Zygapophyseal Joint Fusion in Ankylosing Spondylitis Assessed by Computed Tomography: Associations with Syndesmophytes and Spinal Motion

2017 ◽  
Vol 44 (7) ◽  
pp. 1004-1010 ◽  
Author(s):  
Sovira Tan ◽  
Jianhua Yao ◽  
John A. Flynn ◽  
Lawrence Yao ◽  
Michael M. Ward
Keyword(s):  
Computed Tomography ◽  
Ankylosing Spondylitis ◽  
Spinal Mobility ◽  
Vertebral Level ◽  
Spinal Motion ◽  
Zygapophyseal Joints ◽  
Spinal Damage ◽  
Relationship Of ◽  
The Relationship ◽  
Level Fusion

Objective.Because zygapophyseal joints (ZJ) are difficult to visualize on radiographs, little is known about the relationship of ZJ fusion to other features of spinal damage in ankylosing spondylitis (AS). We used computed tomography (CT) to investigate the concordance of ZJ fusion and syndesmophytes, and examined the contribution of both features to spinal motion.Methods.We performed thoracolumbar CT scans (T10–T11 to L3–L4) on 55 patients. Two readers scored scans for ZJ fusion, which were compared to syndesmophyte height and extent of bridging, measured by computer algorithm at the same levels. We used multiple regression analysis to evaluate the relative contributions of ZJ fusion and syndesmophytes to spinal mobility.Results.Fifty-one percent of patients had ZJ fusion in at least 1 vertebral level. Fusion was present in 129 of 652 individual ZJ. Syndesmophytes and bridging were often present in vertebral levels without ZJ fusion, suggesting that syndesmophytes most often develop first. ZJ fusion was present in 34% of vertebral levels with syndesmophytes and 55.9% of levels with bridging, suggesting a closer association with bridging. Syndesmophytes and ZJ fusion had similar associations with the modified Schober test, but syndesmophytes were more strongly associated with limitations in lateral thoracolumbar flexion. ZJ rarely showed new fusion over 4 years.Conclusion.Thoracolumbar ZJ fusion in AS is rarely present at vertebral levels without syndesmophytes. Syndesmophytes, therefore, likely appear before ZJ fusion at a given vertebral level. Both syndesmophytes and ZJ fusion contribute to limited forward lumbar flexion, but syndesmophytes contribute more to limited lateral flexion.

Ki+-Na+o Countertransport in Erythrocytes of Patients with Essential Hypertension

1981 ◽  
Vol 61 (s7) ◽  
pp. 11s-12s ◽  
Author(s):  
N. Adragna ◽  
M. Canessa ◽  
I. Bize ◽  
H. Solomon ◽  
D. C. Tosteson
Keyword(s):  
Essential Hypertension ◽  
Intracellular Calcium ◽  
Normal Subjects ◽  
Human Erythrocytes ◽  
Hypertensive Patients ◽  
Tentative Hypothesis ◽  
Relationship Of ◽  
The Relationship ◽  
In Cells

1. We describe in this paper a new ouabain-insensitive pathway for Na+ and K+ in human erythrocytes. K+ efflux was measured in cells loaded by the p-chloromercuribenzene-sulphonate (PCMBS) procedure to contain approximately equal amounts of Na+ and K+. K+ efflux was stimulated by external Na+ in the presence of ouabain and frusemide. Na+-stimulated K+ efflux was 0.35 ± 0.12 (mmol h−1 l−1 of cells) in eight normal subjects and 0.64 ± 0.13 in 13 patients with essential hypertension. 2. The Na+-stimulated K+ efflux was not observed in cells loaded in the presence of EGTA. This inhibition by EGTA suggests that K+ efflux is dependent on intracellular calcium. The Ki+-Nao+ countertransport of hypertensive patients was also inhibited by EGTA. The elevated K+—Na+ countertransport of hypertensive patients could be due to a higher intracellular Ca2+ content (Cai2+) or to an increased affinity for Cai2+. The relationship of this pathway to the Gardos effect is not clear since Na+-stimulated K+ efflux occurs without metabolic depletion or inhibition of the Ca2+ pump. As a tentative hypothesis, we relate the Ca2+-dependent downhill movement of K+ and Na+ to the Ca2+-dependent channels described in muscle and nerve, but other hypotheses cannot be excluded at this stage of our research.

scholarly journals Computed Tomography Image Analysis and Clinical Correlations of Retromaxillary Cells

2020 ◽  
pp. 014556132093696
Author(s):  
Cheng Cao ◽  
Fangwei Zhou ◽  
ZhiYan Song ◽  
Zezhang Tao ◽  
Yu Xu
Keyword(s):  
Computed Tomography ◽  
Paranasal Sinus ◽  
Maxillary Sinusitis ◽  
Anatomical Variation ◽  
Sinus Surgery ◽  
Tomography Image ◽  
Males And Females ◽  
Computed Tomography Image ◽  
Relationship Of ◽  
The Relationship

Objective: This study aimed to investigate and analyze the anatomic characteristics of the retromaxillary cell (RMC) by using computed tomography (CT) images of paranasal sinuses and to improve its identification with ethmomaxillary sinus (EMS). Methods: The paranasal sinus CT scans of 441 outpatients or inpatients in our hospital from January 2018 to October 2018 were analyzed. The incidence of RMC, EMS, Haller cell, imaging anatomical characteristics, and morphological manifestations were observed via sinus CTs. The relationship of RMC and ipsilateral maxillary sinusitis was analyzed. Results: The incidence of RMC is 83.90% (740/882). The incidence of males and females was 83.81% (414/494) and 84.02% (326/388), respectively. The incidence of bilateral (72.79%, 321/441) was much higher than that of unilateral (22.22%, 98/441). The lateral extension of the RMC ranged from 1.18 to 13.31 mm, with an average of 6.10 ± 2.03 mm. The incidence of ipsilateral maxillary sinus opacification on the RMC sides and non-RMC sides has no significance difference (χ2 = .054, P = .459). The incidence of Haller cell and EMS decreased significantly in the presence of RMC ( P < .01). Conclusion: The RMC is an anatomical variation originating from posterior ethmoid cells, which is commonly encountered in the clinic. The pneumatization of RMC is highly variable, and a bilateral is common. During endoscopic sinus surgery, it is necessary to carefully identify such an air cell to ensure the complete opening of the paranasal sinus during surgery.

scholarly journals Imaging features of IRIS caused by AIDS and complicated by tuberculosis

2017 ◽  
Vol 6 (1) ◽  
pp. 20-24
Author(s):  
Wei Li ◽  
Wei Liu ◽  
Guiming Zhou
Keyword(s):  
Computed Tomography ◽  
Immune Reconstitution ◽  
Clinical Symptoms ◽  
Imaging Features ◽  
Common Complication ◽  
High Resolution Computed Tomography ◽  
Imaging Research ◽  
Relationship Of ◽  
Inflammatory Syndrome ◽  
The Relationship

Abstract Immune reconstitution inflammatory syndrome (IRIS), a common complication of AIDS, is further complicated by tuberculosis. Its clinical symptoms lack specificity but can be evaluated using diagnostic imaging. High-resolution computed tomography (HRCT) is useful in evaluating the morphology and internal microstructure of lesions associated with the syndrome, as well as the relationship of the internal microstructure with the surrounding tissues. This paper summarizes the present state and progress of imaging research on IRIS caused by AIDS and complicated by tuberculosis.

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