With the introduction of multi-detector row CT scanners, there has been a great leap forward in CT imaging of all body areas. A combination of the multiple detector rows and faster gantry rotation times allows applications such as isotropic imaging, CT angiography, virtual endoscopy and cardiac imaging to now be performed with exquisite results, consistently. phase selective imaging after intravenous contrast enhancement for various organ systems, especially hepatic imaging is also possible. Other major advantages of multi-slice CT (MSCT) are higher patient comfort-in the form of shorter and fewer breath-holds in body imaging, avoiding awkward positioning for coronal imaging and minimizing sedation for pediatric patients. Critically ill patients can also be scanned much faster. Advantages for the radiologist include the ability to obtain variable slice thickness out of the same data set (as long as the slice thickness is greater than the collimation thickness) and a higher patient throughput for busy departments. A limitation is the high image load per exam, an abdominal study generating upto 1000 [1] images for the radiologist to report. The availability of PACS or dedicated reporting workstations makes it easier for the radiologist-filming the entire data set is neither practiced nor encouraged, considering the physical inconvenience and the cost implications.

Blastomycosis is an almost unheard of fungal infection in India. Chronic meningitis is the most common form of Blastomycosis. Presentation of Blastomycosis in the form of extra axial granulomas is very rare. We report the MRI findings in a case of extra axial intra dural blastomycosis involving the central nervous system. T1 and T2 weighted MRI along with contrast enhanced T1 weighted scan was done. Though the diagnosis in the Indian context is difficult, the characteristic appearance though not exclusive to the condition may provide a clue.

Intraductal papillary mucinous tumour is a rare subtype of mucin secreting tumours of the pancreas. It is more common in males and occurs in the head of the pancreas. The tumour has a distinctive appearance on imaging and endoscopy. The lesion can be confused with pancreatitis both clinically and radiologically. It carries a much better prognosis than ductal adenocarcinoma.

Gossypiboma is the name to the pseudotumour within the body that is composed of non-absorbable surgical material with a cotton matrix. The most ]common cause of gossypiboma is the retained surgical sponge [1]. Surgical sponges usually have radioopaque markers readily visible on plain radiographs but occasionally the marker may be distorted by folding, twisting or disintegration over a period of time. Surgical sponges without such markers are still commonly used. Thus retained surgical foreign bodies present a difficult diagnostic problem.

An uncommon but important arterial complication associated with chronic pancreatitis is Pseudoaneurysm formation which may rupture into a hollow viscus and cause G.I. Bleeding [1]. It is known to have very low incidence upto 10 percent [1,3]. The most common artery affected by pseudoaneurysm is splenic artery which is involved by almost half of the cases because of its contiguity with pancreas. [1,2].

Leiomyosarcoma of primary vascular origin is a rare tumor, which arises mainly from the inferior vena cava (IVC). The middle part of IVC is most often affected. There is a strong predilection for women. Clinical symptoms depend upon the size and location of tumor.

Aneurysms of the extracranial Internal Carotid Artery (ICA) are rare. Most of the cases seen are due to spontaneous or traumatic dissection of the cervical ICA. Here we report a surgically treated spontaneous extracranial ICA dissecting aneurysm in a ten-year-old girl. The aneurysm was incidentally noticed while performing a routine brain CT for the evaluation of epilepsy. The dissecting aneurysm arising from the extracranial ICA was initially diagnosed by CT, later on confirmed by Doppler and DSA. The imaging features are described with a brief review of literature.

A simple, new Ultrasonographic technique (viz) M-Mode Echomyography for the study of functional status of masseter muscles and other masticatory muscles such as temporalis and lateral pterygoid muscles has been described. Its superiority over 2-D and 3 D Ultrasonographic studies and its utility in the functional assessment of other striated muscles such as Biceps brachii, brachio- radialis, thenar muscles, pectoralis major, quadriceps, vastus medialis and calf muscles also have been discussed.

The case of a 38-year old male with a giant neurilemoma in the left psoas muscle is reported, which was not associated with von Recklinghausen's disease. Ultrasound and CT showed a large cystic mass in the left psoas muscle. The diagnosis of neurilemoma was confirmed postoperatively by histopathological examination of the mass.

Aim: The study was conducted with the aim of evaluating placental thickness, measured at the insertion of the umbilical cord, as a parameter for estimating gestational age of the fetus. Materials and Methods: The study was conducted on 600 normal antenatal women of all gestational ages ( 10 weeks of gestation) attending Antenatal Clinic at the Department of Obstetrics and Gynecology, S.M.S. Medical College, Jaipur (Rajasthan) from August 2001 to February 2002. USG was done by using Toshiba Canasee II machine with a 3.75 MHz sector probe. After estimating the fetal age by CRL, BPD, HC, AC, and FL, the placental thickness with standard deviation was calculated for all gestational ages. Results: It was observed that the placental thickness gradually increased from 15 mm at 11 weeks of gestation to 37.5 mm at 39 weeks. From the 22nd week to the 35th week of gestation the placental thickness coincide almost exactly with the gestational age in weeks. Conclusion: To conclude, the measurement of the placental thickness is an important parameter for estimation of fetal age along with other parameters especially in the late mid trimester and early third trimester, where the exact duration of pregnancy is not known.