Automated Methods to Segment Kidneys and Detect Tumors Using CT Images

SummaryTwo automated methods for two-stage factor VIII assays have been compared with one another, and evaluated in practice. The Depex method records the clotting time when an electric circuit is completed by the formation of a fibrin thread across a hook-type electrode; the Electra method is based on an optical density technique of clot detection. The two methods gave comparable results for measured levels of factor VIII when haemophilic or “normal” plasmas were assayed. Results from the two methods in practice also suggest that both are valid at low and “normal” factor VIII levels. The Electra method is also probably suitable for assays of concentrates; however, the Depex method appears to give falsely high values in these circumstances, and experimental findings suggest that the reason may be that increased viscosity due to the high fibrinogen levels in factor VIII concentrates causes premature closure of the circuit between the two ends of the Depex electrode. The main advantage of the Depex method is that, provided 3 or 4 machines are available, a given number of assays can be completed more quickly than on Electra. The main advantages of Electra are that it is probably subject to less laboratory error than Depex, and that it is suitable for assaying concentrates as well as haemophilic and “normal” plasmas.

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Fully automatic quotient image generation using V/Q SPECT/CT images

10.1055/s-0039-1683718 ◽

2019 ◽

Author(s):

K Herdinai ◽

S Urbán ◽

Z Besenyi ◽

L Pávics ◽

N Zsótér ◽

...

Keyword(s):

Ct Images ◽

Image Generation ◽

Fully Automatic

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Fully automatic lung lobe segmentation using V/Q SPECT/CT images

10.1055/s-0040-1708371 ◽

2020 ◽

Author(s):

A Király ◽

S Urbán ◽

Z Besenyi ◽

L Pávics ◽

N Zsótér ◽

...

Keyword(s):

Ct Images ◽

Lung Lobe ◽

Fully Automatic ◽

Lobe Segmentation

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Pseudocolor Transformation for the Visualization of Stapes in CT Images

Skull Base ◽

10.1055/s-2006-958540 ◽

2007 ◽

Vol 16 (S 2) ◽

Author(s):

Moon Suh Park ◽

Jae Yong Byun ◽

Seung Gun Yeo ◽

Chang Il Cha

Keyword(s):

Ct Images

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Clinical Manifestations and Radiological Characteristics on Rosai-Dorfman Disease: A Retrospective Observational Study

Medical & Clinical Research ◽

10.33140/mcr.05.05.005 ◽

2020 ◽

Vol 5 (5) ◽

Keyword(s):

Blood Vessels ◽

Abdominal Cavity ◽

Clinical Manifestations ◽

Ct Images ◽

High Signal ◽

Radiological Features ◽

Imaging Characteristics ◽

Rosai Dorfman Disease ◽

Heterogeneous Enhancement ◽

The Masses

Background and Objective: Rosai-Dorfman disease (RDD) are usually misdiagnosed because of rarity and nonspecific clinical and radiological features. The aim of our study is to explore the clinical and imaging characteristics of RDD to improve diagnostic accuracy. Methods: Clinical and imaging data in 10 patients with RDD were retrospectively analyzed. 7 patients were underwent CT scanning and 3 patients were underwent MR examination. Results: 8 (8/10) patients presented with painless enlarged lymph nodes (LNs) or mass. 3 cases were involved with LNs, 5 cases were involved with extra-nodal tissues, and the remaining 2 cases were involved with LNs and extra-nodal tissue simultaneously. In enhanced CT images, enlarged LNs displayed mild or moderate enhancement, and 2 cases showed heterogeneous ring-enhancement. MR features of 3 patients with extra-nodal RDD, 2 cases showed a mass located in the subcutaneous and anterior abdominal wall respectively, and 1 case showed an intracranial mass. Besides, all lesions showed high signal foci on DWI images, and were characterized by marked heterogeneous enhancement with blurred edge. The dural/fascia tail sign and dilated blood vessels could be seen around all the lesions on enhanced MRI. Radiological features of 2 cases with LN and extranodal tissue involved, one case presented with the swelling and thickening of pharyngeal lymphoid ring and nasopharynx, meanwhile with enlarged LNs in bilateral submandibular area, neck and abdominal cavity, and also companied with osteolytic lesion in right proximal humerus. All these LNs displayed mild and moderate enhancement on CT images. Another case showed enlarged LNs in bilateral neck accompanied with soft tissue mass in the sinuses. Conclusions: RDD occurred commonly in young and middle-aged men and presented with painless enlarged LNs or mass.RDD had a huge diversity of imaging findings, which varied with different location. The radiological features, such as small patches of high signal foci in the masses on DWI images, heterogeneous enhancement and blood vessels around the masses, are helpful in diagnosis of extranodal RDD.

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