Papers by Raman Rajagopalan
Ear Nose Throat Journal, Dec 1, 2007
Metastases to the larynx from distant primaries are rare. We report a case of a laryngeal metasta... more Metastases to the larynx from distant primaries are rare. We report a case of a laryngeal metastasis from a rectal carcinoma.
Proceedings of the 7th International Conference on Industrial and Engineering Applications of Artificial Intelligence and Expert Systems, May 31, 1994
... Downloads (6 Weeks), 0. Downloads (12 Months), 0. View colleagues of Raman Rajagopalan.Benjam... more ... Downloads (6 Weeks), 0. Downloads (12 Months), 0. View colleagues of Raman Rajagopalan.Benjamin Kuipers No contact information provided yet. ... Downloads (12 Months), 190. View colleagues of Benjamin Kuipers. top of page REFERENCES. References are not available. ...
Otolaryngology - Head and Neck Surgery, 2007
Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India, 2010
To study the prevalence of anterior external bony ear canal bulge. Hundred patients each of the s... more To study the prevalence of anterior external bony ear canal bulge. Hundred patients each of the sexes among three races in Malaysia were studied with an otoscope and microscope. Anterior external ear canal wall bulge is seen in 34% of the Malays, 32% of the Chinese and 29.5% of the Indians In about one third of the population in Malaysia an anterior canal wall bulge is seen.
European Archives of Oto-Rhino-Laryngology, 2014
High acoustic noise level is one of the unavoidable side effects of 3 T magnetic resonance imagin... more High acoustic noise level is one of the unavoidable side effects of 3 T magnetic resonance imaging (MRI). A case of hearing loss after 3 T MRI has been reported in this institution and hence this study. The objective of this study was to determine whether temporary threshold shift (TTS) in high frequency hearing occurs in patients undergoing 3 T MRI scans of the head and neck. A total of 35 patients undergoing head and neck 3 T MRI for various clinical indications were tested with pure tone audiometry in different frequencies including high frequencies, before and after the MRI scan. Any threshold change from the recorded baseline of 10 dB was considered significant. All patients were fitted with foamed 3 M earplugs before the procedure following the safety guidelines for 3 T MRI. The mean time for MRI procedure was 1,672 s (range 1,040-2,810). The noise dose received by each patient amounted to an average of 3,906.29 % (1,415-9,170 %). The noise dose was derived from a normograph used by Occupational Noise Surveys. This was calculated using the nomograph of L eq, L EX, noise dose and time. There was no statistically significant difference between the hearing threshold before and after the MRI procedures for all the frequencies (paired t test, P > 0.05). For patients using 3 M foamed earplugs, noise level generated by 3 T MRI during routine clinical sequence did not cause any TTS in high frequency hearing.
Congenital Anomalies, 2010
We report a rare case of laryngotracheal anomaly and its possible etiology and mode of presentati... more We report a rare case of laryngotracheal anomaly and its possible etiology and mode of presentation. A teenager presented with voice change and a neck lump. Investigations revealed a laryngeal anomaly in which the larynx was hyperdescended. It was accompanied by low lying thyroid gland and hyoid bone together with an absence of a cervical segment of the esophagus and trachea. The anomaly only became noticeable secondary to pubertal changes in the thyroid cartilage of the teenager. An embryological defect during the formation of the laryngotracheal tube and esophagus is a possible explanation of this anomaly. The present case probably represents the third reported of its kind.
Ocean & Coastal Management, 2000
... The adverse impact of human activities on the coastal zone and the coastal waters include eut... more ... The adverse impact of human activities on the coastal zone and the coastal waters include eutrophication, contamination of sea food; land subsidence and/or salinization of underground aquifers; building up of solid wastes including non-biodegradables such as plastics ...
Journal of Neurosurgery, 2008
Xanthoma formation is frequently seen over the subcutaneous tissue of extensor surfaces and tendo... more Xanthoma formation is frequently seen over the subcutaneous tissue of extensor surfaces and tendons that have received minor trauma or friction in patients with hypercholesterolemia. However, temporal bone xanthomas with intracranial extension are uncommon. To the best of the authors' knowledge, this is the second report in the literature in which bilateral extension of a xanthoma is described. Xanthomas of the temporal bone are benign lesions, and complete or even partial removal is effective. The predisposing cause of the lesion should also be treated.
Journal of Robotic Systems, 1997
ABSTRACT
This paper presents a feedforward control scheme using an inverse dynamic model of a DC motor for... more This paper presents a feedforward control scheme using an inverse dynamic model of a DC motor for speed control in the presence of changes in dynamics during motion. Conventional velocity control schemes perform well for nominal operating conditions of the motor as the gains are tuned for such operating conditions. Some of the operating conditions considered are the changes in
Computers in Industry, 1992
... [8] FN Silverman and JC Carter, "A costbased methodol ogy for stochastic line ba... more ... [8] FN Silverman and JC Carter, "A costbased methodol ogy for stochastic line balancing with intermittent line Computers in Industry K. Sudhir, R. Rajagopalan Precedence network generation 191 [91 [lO] stoppages", Manage. ... 123154. [32] D. Navinchandra, D. Sriram and RD ...
Auris Nasus Larynx, 2011
The higher field strength magnetic resonance imaging (MRI) such as 3 Tesla (T) and above generate... more The higher field strength magnetic resonance imaging (MRI) such as 3 Tesla (T) and above generates noise that has potential detrimental effects on the hearing. Temporary threshold shifts following MRI examination have been reported for MRI with lower field strength. Such effect, however, have not been reported so far for a 3 T MRI. We report a case that exemplifies the possible detrimental effects of a 3 T MRI generated noise on the auditory system. Our patient underwent investigation of his chronic backache in a 3 T MRI unit and developed hearing loss and tinnitus post-MRI examination. Hearing assessment was done using pure tone audiogram, distortion product otoacoustic emission (DPOAE) and brainstem electrical response audiometry (BERA) which revealed a unilateral sensorineural hearing loss which recovered within 3 days. However the tinnitus persisted. This is possibly a case of temporary threshold shift following noise exposure. However a sudden sensorineural hearing loss remains the other possibility. #
Proceedings of the Seventh International Conference on Industrial and Engineering Applications of Artificial Intelligence and Expert Systems (IEA/AIE-94). Langhorne, PA: Gordon and Breech Science Publishers. Die interaktive Kopplung von Text und Diagramm bei der Tobias Otto, May 31, 1994
... Downloads (6 Weeks), 0. Downloads (12 Months), 0. View colleagues of Raman Rajagopalan.Benjam... more ... Downloads (6 Weeks), 0. Downloads (12 Months), 0. View colleagues of Raman Rajagopalan.Benjamin Kuipers No contact information provided yet. ... Downloads (12 Months), 190. View colleagues of Benjamin Kuipers. top of page REFERENCES. References are not available. ...
Describes an ongoing project to develop a theory of qualitative spatial reasoning which merges a ... more Describes an ongoing project to develop a theory of qualitative spatial reasoning which merges a simple, intuitive description of the spatial extent, relative position, and orientation of objects with existing methods for qualitative reasoning about dynamically changing worlds. We are applying our theories within a system for problem solving about the magnetic fields domain. We describe methods for integrating diagram and test input to a problem solver, methods of abstraction for modeling the spatial extents of objects, and a ...
Acta medica Iranica, 2012
We report a rare case of base of tongue tuberculosis following pulmonary tuberculosis. Patient pr... more We report a rare case of base of tongue tuberculosis following pulmonary tuberculosis. Patient presented to us with chief complaints of sore throat and pain on swallowing for period of 3 months. On examination with 70 degree telescope, we observed an ulcer on right side of base of tongue. The edges of the ulcer appeared to be undermined with whitish slough at the centre of the ulcer. Examination of neck showed a multiple small palpable middle deep cervical lymph nodes on right side of neck. Biopsy of the ulcer was taken, which showed granulomatous inflammation, suggestive of tuberculosis. Laboratory investigations revealed a raise in erythrocyte sedimentation rate, sputum for acid fast bacilli was strongly positive. Chest X ray was performed for patient showed multiple areas of consolidation. Patient was referred to chest clinic for further management of tuberculosis and was started on anti-tuberculous drugs. In conclusion tuberculosis of oral cavity is rare, but should be considere...
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Papers by Raman Rajagopalan