SPECT images provide the best views of metastatic pelvic nodal involvement. Planar and SPECT positioning was critical in evaluating questionable lymph nodes. Volume rendered three-dimensional registration best differentiates between normal vasculature and metastatic disease.
Optimal acquisition parameters for delayed imaging included 128 x 128 matrix and 65 sec/step. The LFOV dual-head SPECT camera required only one SPECT acquisition that encompassed both the pelvis and abdomen. In processing these images, the most diagnostic results were obtained with a three-dimensional low-pass post filter. The most effective patient preparation consisted of an oral cathartic, enema and catheterization when needed.
A 2-year-old cat was presented with generalised muscle tremors and progressive fore- and hindlimb ataxia, 5 months after the initiation of chemotherapy for thymic lymphoma.
The lymphoma was treated with combination chemotherapy (cyclophosphamide, vincristine and prednisolone), which resulted in remission. It is possible that the lymphoma chemotherapy resulted in the development of the multiple meningiomas as secondary malignancies. The neurological signs progressed to paralysis and the cat subsequently died. On autopsy, multiple meningiomas were diagnosed, which is an unusual finding.
A 3-year-old male German shepherd dog was presented with severe generalised seizures. The dog was protein-intolerant and showed severe hyperammonaemia on ammonia stimulation. The hyperammonaemic state was present for at least 6 weeks and then spontaneously resolved.
No obvious cause (liver disease, portocaval shunts, urea cycle enzyme deficiencies, drug therapy or urinary tract obstruction) could be identified. To verify the findings, microbiological tests were performed and the results compared to those obtained with conventional antibacterial treatment.
It is possible that this dog had a variation of transient hyperammonaemic syndrome, described in man and recently in a juvenile Irish wolfhound, that extended into adulthood. In this in vivo study, 40 patients with infected root canals underwent diode laser treatment. Extensive bacterial reduction was achieved in all cases by repeating laser treatment only once. The maximum log kill was 4.22 for streptococci and 3.33 for staphylococci. In the control group, a maximum reduction by only one log step could be achieved in 6 of 10 patients.
The microbiological examination revealed streptococci at relevant concentrations in 20 cases and staphylococci in 5 cases. Following the first irradiation, minimal streptococcal growth was observed in 7 root canals and minimal staphylococcal growth in 2 root canals.
Compared with the results achieved with the conventional bactericidal technique in the control group, the high power diode laser seems to be highly suitable for killing bacteria in infected root canals.
The phantom is based on a transparent two-component silicone, which is molded into the desired shape and cured at room temperature. Specific optical properties are obtained by adding scatterers (Al2O3 particles or polystyrene microspheres) and absorbers (dyes or pigments).
A method to measure the radiant energy fluence rate in the phantom is described. This phantom is used for testing new light distributors designed for photodynamic therapy of the bronchi.
The proposed technique allows one to produce a stable three-dimensional phantom with accurately predictable optical properties. Hypertrophic scarring and rigid scar contracture are disorders of wound healing for which there is presently no effective therapy.
The dermal fibroblast plays a major role in scar fibrillogenesis and contracture. The objective of this study was to establish a selective and effective method to destroy fibroblasts.