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 X-ray Dorso-lumbar spine of a middle aged man presented with back ache. Skiagram shows classical changes of a disease.
What is the diagnosis?
ANSWER- Ankylosing Spondylitis, Bamboo Spine Appearance
Winner- ALIREZA, Drop me an email at sumerdoc-AT-yahoo-DOT-com for your prize...
Winner will get a free copy of the book "Review of Radiology" by Dr Sumer K Sethi, a small handbook of Radiology for medical students.
CASE CONTRIBUTED BY- Dr. Suresh Toppo,MD Radiodiagnosis. Senior Resident Lady Hardinge Medical College
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August 2005
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 My book "Review of Radiology" has been put up as the featured Review in-
Anil Aggrawal's Internet Journal of Book Reviews
Volume 4, Number 1, January - June 2005
The Review goes on like-
One
of the most important books to hit the literary scene in recent times
is Review of Radiology written by Sumer K. Sethi. Dr. Sumer came out
with the first edition last year, and just in one year all copies were
lapped up by radiology students around the world.
So important
has this book been, that it has been recommended by most professors of
radiology to their students. Although the book would be useful to all
radiologists in practice, it is particularly helpful to students
appearing for the MD/MS entrance examinations.
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August 2005
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Objective criteria of triangular cord sign in biliary atresia on US scans.
Thickness of the echogenic anterior wall of the right portal vein (EARPV) is measured. The TC sign was defined as thickness of the EARPV of more than 4 mm on a longitudinal scan. Biliary atresia was diagnosed when the TC sign was present.
Mean thickness of the EARPV was significantly greater in patients with biliary atresia (5.39 mm) than in patients with neonatal hepatitis (2.17 mm) (P <.05). Use of 4-mm thickness as the criterion for TC sign was statistically significant (P <.05), resulting in a sensitivity of 80%, specificity of 98%, and positive and negative predictive values of 94% for the diagnosis of biliary atresia.
An objective criterion of the TC sign is an EARPV thicker than 4 mm on a longitudinal scan.
Read the full Article at-
Radiology.2003 Nov;229(2):395-400
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August 2005
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Micro-CT of the Human Lung: Imaging of Alveoli and Virtual Endoscopy of an Alveolar Duct in a Normal Lung and in a Lung with Centrilobular Emphysema—Initial Observations
Henrik Watz, MD, Andreas Breithecker, MD, Wigbert Stephan Rau, MD and Andres Kriete, PhD
The appearance of human lung parenchyma at the structural level of alveoli was investigated by the use of micro–computed tomography (CT). Approval for use of autopsy lungs was given by the head of the pathology institute of the university, in accordance with the requirements of the State Ministry of Science and Arts and without the need for institutional review board approval. Two human lungs (one normal lung and one lung with centrilobular emphysema of a mild to moderate degree) were inflated and fixed with hot formalin vapor. Lung specimens excised from the superior segment of the left lower lobe (B6) were stained with silver nitrate in a vacuum and investigated at a volume of interest of 4 mm for each side with a voxel size of 14 µm. Normal-size and enlarged alveoli became visible. A three-dimensional reconstruction of the terminal airspaces made virtual endoscopy of the alveolar ducts possible.
Full Article at-
Radiology 2005;236:1053-1058
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August 2005
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Modern ultrasound technologies and their application in pediatric urinary tract imaging.
Darge K, Heidemeier A
In children ultrasound plays a central role in the diagnostic imaging of the urinary tract. It is used most frequently and as a primary diagnostic option. Consequently, innovations in ultrasound technology and ultrasound contrast media have major impact on pediatric urosonography. Harmonic imaging is a modality that produces artifact-free images with high resolution. It has been shown that harmonic imaging is superior to fundamental mode in many urosonographic indications. Color Doppler is an established imaging modality, but its application for diagnosis of stones in the urinary tract, especially in children, is relatively new. The so-called twinkling sign, a color Doppler artifact at the site where one normally expects the acoustic shadow to be, enhances the conspicuity of the stone. A further development is three-dimensional (3D) ultrasound. It offers better volume measurement of the bladder and kidneys than 2D ultrasound. Contrast-enhanced voiding urosonography has already proven to be a valuable alternative in the diagnosis of vesicoureteral reflux. Thus, a significant decrease of radiation exposure has become possible as it replaces the radiological methods. With the introduction of contrast-specific ultrasound imaging modalities, further improvements in voiding urosonography are emerging.
Full Article-
Radiologe. 2005 Aug 6; [Epub ahead of print]
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August 2005
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Chest Pain Evaluation in the Emergency Department: Can MDCT Provide a Comprehensive Evaluation?
Charles S. White, Dick Kuo, Mark Kelemen, Vineet Jain, Amy Musk, Eram Zaidi, Katrina Read, Clint Sliker and Rajnish Prasad
Patients with chest pain who presented to the emergency department without definitive findings of acute myocardial infarction based on history, physical examination, and ECG were recruited immediately after the initial clinical assessment. For each patient, the emergency department physician was asked whether a CT scan would normally have been ordered on clinical grounds (e.g., to exclude pulmonary embolism). Each consenting patient underwent enhanced ECG-gated 16-MDCT. Ten cardiac phases were reconstructed. The images were evaluated for cardiac (coronary calcium and stenosis, ejection fraction, and wall motion and perfusion) and significant noncardiac (pulmonary embolism, dissection, pneumonia, and so forth) causes of chest pain. Correlation was made between the presence of significant cardiac and noncardiac findings on CT and the final clinical diagnosis based on history, examination, and any subsequent cardiac workup at the 1-month follow-up by a consensus of three physicians.
Sensitivity and specificity for the establishment of a cardiac cause of chest pain were 83% and 96%, respectively. Overall sensitivity and specificity for all other cardiac and noncardiac causes were 87% and 96%, respectively.
ECG-gated MDCT appears to be logistically feasible and shows promise as a comprehensive method for evaluating cardiac and noncardiac chest pain in stable emergency department patients. Further hardware and software improvements will be necessary for adoption of this paradigm in clinical practice.
Full Article-
AJR 2005; 185:533-540
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August 2005
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Here is a link to an atlas on normal anatomy on Diffusion Tensor Imaging, its very enlightening.
Check out-
Diffusion Tensor Imaging Atlas
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August 2005
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As diffusion is truly a three dimensional process, molecular mobility in tissues may be anisotropic, as in brain white matter. With diffusion tensor imaging (DTI), diffusion anisotropy effects can be fully extracted, characterized, and exploited, providing even more exquisite details on tissue microstructure. The most advanced application is certainly that of fiber tracking in the brain, which, in combination with functional MRI, might open a window on the important issue of connectivity. DTI has also been used to demonstrate subtle abnormalities in a variety of diseases (including stroke, multiple sclerosis,dyslexia, and schizophrenia) and is currently becoming part of many routine clinical protocols.
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Diagnostic imaging of vesicoureteral reflux.
Darge K, Trusen A, Troeger J
The diagnostic imaging modalities for vesicoureteral reflux in children comprise both radiologic and sonographic methods. The radiologic methods are voiding cystourethrography and radionuclide cystography. Voiding cystourethrography is the commonest imaging modality for reflux. With the introduction of pulsed fluoroscopy the radiation exposure of this examination is significantly curtailed. It is the imaging of first choice of the urethra. Various sonographic methods of reflux examination had been tried in the past. The real breakthrough came with the availability of stabilized US contrast media. The diagnostic accuracy of contrast-enhanced voiding urosonography has been found to be comparable to the radiologic methods. With the emergence of harmonic imaging the potential for significant improvement of the sonographic method has been achieved. Voiding urosonography is primarily performed in follow-up studies and as the first reflux examination in girls.
Full Article at-
Rays. 2002 Apr-Jun;27(2):99-106
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August 2005
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On popular demand a new feature has been added to this site an online radiology book store which directly links to Radiology book on Amazon.com
Check out-
Radiology Book Store
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August 2005
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