Classification of dental x-ray images

Forensic dentistry is concerned with identifying people based on their dental records. Forensic specialists have a large number of cases to investigate and hence, it has become important to automate forensic identification systems. The radiographs acquired after a person is deceased are called the Post-mortem (PM) radiographs, and the radiographs acquired while the person is alive are called the Ante-mortem (AM) radiographs. Dental biometrics automatically analyzes dental radiographs to identify the deceased individuals. While, ante mortem (AM) identification is usually possible through comparison of many biometric identifiers, postmortem (PM) identification is impossible using behavioral biometrics (e.g. speech, gait). Moreover, under severe circumstances, such as those encountered in mass disasters (e.g. airplane crashes and natural disasters such as Tsunami) most physiological biometrics may not be employed for identification, because of the decay of soft tissues of the body to unidentifiable states. Under such circumstances, the best candidates for postmortem biometric identification are the dental features because of their survivability and diversity.;In my work, I present two different techniques to classify periapical images as maxilla (upper jaw) or mandible (lower jaw) images and we show a third technique to classify dental bitewing images as horizontally flipped/rotated or horizontally un-flipped/un-rotated. In our first technique I present an algorithm to classify whether a given dental periapical image is of a maxilla (upper jaw) or a mandible (lower jaw) using texture analysis of the jaw bone. While the bone analysis method is manual, in our second technique, I propose an automated approach for the identification of dental periapical images using the crown curve detection Algorithm. The third proposed algorithm works in an automated manner for a large number of database comprised of dental bitewing images. Each dental bitewing image in the data base can be classified as a horizontally flipped or un-flipped image in a time efficient manner

A Novel Color Image Encryption Scheme Based on Arnold’s Cat Map and 16-Byte S-box

The presented work sets out to subsidize to the general body of knowledge in the field of cryptography application by evolving color image encryption and decryption scheme based on the amalgamation of pixel shuffling and efficient substitution. Arnold’s cat map is applied to snap off the correlation in pixels of image and the shuffled image is encrypted by 16-byte S-box substitution. Computer simulations with a standard test image and the outcome is presented to scrutinize the competence of the projected system. Several image-quality measures and security analyses have been made out for the encrypted image to estimate the statistical and differential strength of the scheme. A comparison is presented by following out the scheme with 256-byte S-box and 16-nibble S-box to support for sturdiness of the idea. It is concluded from the results of analyses that the proposed scheme with 16-byte S-box can resist exhaustive attacks and is apt for practical applications

Paratesticular solitary fibrous tumour mimicking cellular angiofibroma: An unusual morphology and rare site

Solitary fibrous tumour (SFT) is a ubiquitous benign mesenchymal tumour of fibroblastic origin, which occurs most often in middle-aged adults. It usually presents as lung mass originating from pleura, but extrapleural occurrence is also common. Tumour is characterised by hypo- and hyper-cellular areas of spindle-shaped cells, arranged in haphazard manner with dispersed staghorn-shaped vessels. Surgical excision is the curative treatment. SFTs of the primary testicular or paratesticular region are extremely rare, but they exhibit histologic findings similar to SFTs originating at other body sites. Here, we report the case of a paratesticular SFT in a 37-year male, who presented with a non-tender, firm, mobile, left-sided retrotesticular swelling with unique histological features closely mimicking cellular angiofibroma, a common tumour of paratesticular location. Key Words: Solitary fibrous tumour, Paratesticular, benign, angiofibrom

Transformational Leadership and Corporate Reputation: Mediation Effects of Employer Branding

The purpose of this paper is to examine the impact of transformational leadership and corporate reputation on employer branding by testing a hypothesized model. This study employed a quantitative online survey technique. The researcher distributed 350 questionnaires through purposive sampling out of which 132 questionnaires received back for data analysis. Regression analysis was selected to analyze the collected data to test the hypothesis developed from past literature. Results validate that transformational leadership has an impact on employer branding and employer branding has a direct impact on corporate reputation but correlation amid transformational leadership and business reputation goes insignificant when added employer branding showing full mediation of this variable. The present study backs the writings of business reputation that can be developed through transformational leadership and employer branding. The findings would be helpful for organizational leaders in developing strategies to create a corporate reputation

Role of Gum Chewing After Small Gut Anastomosis

This study was performed to access the effectiveness of gum chewing on gut motility in early postoperative period after small gut anastomosis in patients operated for reversal of ileostomy or ileocolostomy. Methods: This prospective, randomized trial was undertaken at Surgical Unit-I, Holy Family Hospital, Rawalpindi Medical University, Rawalpindi from March 2016 to March 2018. 90 patients were randomly divided into two equal groups. All patients underwent small gut anastomosis after reversal of ileostomy or ileocolostomy. In group A (gum chewing group), patients were advised to chew gum, whereas group B (control group) patients did not received any gum for chewing and continued standard post-operative care. Both groups were kept NPO till 2nd post-operative day. After surgery, all patients were observed for onset of bowel sounds, time after surgery when flatus and stool were passed, time required for return of appetite and discharge from hospital. Patient satisfaction with postoperative course, incidence of anastomotic leak, wound infection and mortality was also recorded in both groups. Results : Statistically, group A and group B were similar in age, gender and type of procedure. There was significant difference between both groups for onset of bowel sounds, passage of first flatus, complaints of nausea and vomiting, appetite, duration of hospital stay and patient’s satisfaction level (P < 0.05). In Group A, 35 patients were satisfied whereas in group B, only 5 patients were happy with their postoperative course (P < 0.05). There was no statistically significant difference between groups for incidence of anastomotic leak, wound infection and mortality. Conclusion: It is safe and cost effective to advise gum chewing in patients undergoing small gut anastomosis for reducing duration of postoperative ileus and improving level of patient satisfaction about their postoperative course. Keywords: Postoperative ileus, Ileostomy, Anastomotic leak, Surgical site infection &nbsp

Clinico-epidemiological Characteristics of Children with Infectious Meningitis at Nishtar Medical Hospital

Objective: This study aims to determine the common Clinico-epidemiological Characteristics of Patients suffering from infectious meningitis presenting at Nishtar medical university hospital Multan, Pakistan. Study design: Descriptive cross-sectional study Place and duration of study: Pediatric department, Nishtar Hospital Multan the duration of the study was February 01, 2016 to January 31, 2017. Method The study comprised of 172 patients. All the children of age 1 month to 12 years with suspected meningitis presenting to Pediatric Department Nishtar Hospital, Multan were included in our study. The patients who were critically ill or immune compromised were not included in the study. The cases in which the parents did not give consent were also excluded. The written informed consent was taken from the parents. All these cases were evaluated by detailed history, thorough physical examination and the necessary investigations. All the demographic data and other variables related to clinico-epidemiological features were measured and recorded using a specifically designed performa. The data were analyzed by using computer program SPSS 21 version. Result Of the 154 patients included in the final analysis, 98 (63.6%) were females and 56 (36.4%) males. The age ranged from 1 month to 12 years with a median of 31 months (6.00 - 72.50). Seventy-five percent of them were below 5 years. On the basis of investigations, bacterial meningitis was diagnosed in 91, viral meningitis in 27, tuberculous meningitis in 21 and cryptococcal meningitis in 15 patients. The most common clinical presentations of meningitis were fever, vomiting, headache, irritability, neck stiffness and altered level of consciousness. While the photophobia and fits were less common. The GCS score was more than 13 in 109 patients (70.8%) while less than eight GCS score was observed in 45 children (29.2%). Most of the complications were observed in the initial 36 hours of admission. The commonly observed complications were an altered level of sensorium, seizure, and shock. The minimum length of hospitalization was one day and the maximum was 36 days with median (IQR) of 12 days (4-15). The mortality was observed in 22 patients (14.3%) of Pediatric Medicine Department. Conclusion Meningitis is a highly morbific and fatal central nervous system infection in children population. It is associated with life-threatening complications and exhibits highly diverse clinical course with a very non-specific sign and symptoms. Younger children of rural areas are highly prone to fall a victim to this lethal disease. By vaccinating the children population against causative agents of meningitis, we can reduce the burden of disease. Keywords: Meningitis.  Children. Clinico-epidemiological features