What type of MRI is that?????????????????
Monday, June 13, 2011
Omnipaque
The first time i saw an INTRAVENOUS PYELOGRAM being done, i observed that the list of drugs included the OMNIPAQUE. So i began to wonder what omnipaque was? It was obvious that the word was a trade name of a drug. This is what i learnt later... Read below ...
Iohexol is a contrast agent, sold under the trade name Omnipaque.
It is available in various concentrations, from 140 to 350 milligrams of iodine per milliliter.
Omnipaque 350 is commonly used as a contrast agent during coronary angiography.
The osmolality of iohexol ranges from 322 mOsm/kg—approximately 1.1 times that of blood plasma—to 844 mOsm/kg, almost three times that of blood.
Despite this difference, iohexol is still considered a low-osmolality contrast agent; the osmolality of older agents, such as diatrizoate, may be more than twice as high.
Luftsichel sign
The LUFTSICHEL sign (from German, meaning air crescent) is due to the overinflated superior
segment of the ipsilateral lower lobe occupying the space between the
mediastinum and the medial aspect of the collapsed upper lobe, resulting in a
paramediastinal translucency.
The sign is more common on the left than the right and is regarded as a typical appearance of left upper lobe collapse.
(A) A left upper lobe collapse demonstrating paramediastinal lucency (arrow). (B) CT shows interposition of aerated lung between the collapse and the mediastinum (arrow). There is also a large right paratracheal node causing some distortion of the SVC.
The sign is more common on the left than the right and is regarded as a typical appearance of left upper lobe collapse.
(A) A left upper lobe collapse demonstrating paramediastinal lucency (arrow). (B) CT shows interposition of aerated lung between the collapse and the mediastinum (arrow). There is also a large right paratracheal node causing some distortion of the SVC.
Friday, June 10, 2011
The appendix dilemma
Early in the morning today, we got a case of appendicitis which was already diagnosed and all we had to do was give them a picture of the ultrasound image so that they could get the surgery done free of cost.
My senior started finding the appendix(inflamed) with the probe and after he found it on the screen, freezed it and started taking measurements of the cross section of the appendix.
He freezed two images. One of the cross section and the other of the longitudinal section.
The diameter in the cross section image measured 6.7 mm and the diameter on the longitudinal section measured 7.3 mm (measured at the biggest bulge).
He could have given the cross section diameter, but instead he opted for the diameter in the longitudinal section, that is 7.3 mm.
I started thinking. The book GRAINGER AND ALLISON DIAGNOSTIC RADIOLOGY, gives the measurement of 7mm or greater than 7mm, as diagnostic of appendicitis, where as DAVID SUTTON radiology gives the measurement of greater than 6.5 mm as diagnostic of appendicitis.
Though all the other ultrasound signs of acute appendicitis were present, i was wondering
*if there was an exact value of diameter of appendix that was diagnostic of appendicitis?
*if the value changed from country to country or from gender to gender?
*if the diagnosis can be given even with smaller measurements when there are certain additional signs?
My senior started finding the appendix(inflamed) with the probe and after he found it on the screen, freezed it and started taking measurements of the cross section of the appendix.
He freezed two images. One of the cross section and the other of the longitudinal section.
The diameter in the cross section image measured 6.7 mm and the diameter on the longitudinal section measured 7.3 mm (measured at the biggest bulge).
He could have given the cross section diameter, but instead he opted for the diameter in the longitudinal section, that is 7.3 mm.
I started thinking. The book GRAINGER AND ALLISON DIAGNOSTIC RADIOLOGY, gives the measurement of 7mm or greater than 7mm, as diagnostic of appendicitis, where as DAVID SUTTON radiology gives the measurement of greater than 6.5 mm as diagnostic of appendicitis.
Though all the other ultrasound signs of acute appendicitis were present, i was wondering
*if there was an exact value of diameter of appendix that was diagnostic of appendicitis?
*if the value changed from country to country or from gender to gender?
*if the diagnosis can be given even with smaller measurements when there are certain additional signs?
First things First
I am a Postgraduate in MD RADIODIAGNOSIS from INDIA, who has joined the course very recently.
The other day i was thinking about starting a blog where i would be able to share my experiences with other postgraduates, as well as senior residents and professors, who can guide me through my course and clear my doubts if any.
So here it is.
Feel free to comment.
THANK YOU.
The other day i was thinking about starting a blog where i would be able to share my experiences with other postgraduates, as well as senior residents and professors, who can guide me through my course and clear my doubts if any.
So here it is.
Feel free to comment.
THANK YOU.
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