Perfect localization of hyperactive parathyroid glands is useful to minimize operation time, incision and reduce patient morbidity. 52 patients with hyperparathyroidism were investigated, 14 with primary and 38 with secondary hyperparathyroidism foll
owing renal failure. Surgery has been done on 36 patients (14 with primary and 22 with secondary hyperparathyroidism). Sensitivity of 99mTc-tetrofosmin scintigraphy was estimated after surgical removal of Hyperfunctioning glands and compared with that of ultrasound and magnetic resonance imaging. The sensitivity of 99mTc-scintigraphy (79,5%) exceeded the sensitivity of ultrasound (68,2%) and magnetic resonance imaging (71,6%). Parathyroid hormone (P.T.H.) and calcium levels in serum were compared with positive 99mTc-tetrofosmin Scintigraphy. Results demonstrated correlation between positive 99mTc-tetrofosmin scintigraphy and parathyroid hormone levels with significant statistical difference of P < 0.001 and all patients with primary hyperparathyroidism with P.T.H. levels of 195 pg/ml or more were scintigraphically positives. All patients with secondary hyperparathyroidism with P.T.H. levels of 1200 or more were positives. No correlation was detected between calcium levels and positivity or negativity of scintigraphic results.
The present work, aims to inspect by ultrasonic method numbers of imported steel
billets, which cause stopping and breaking in the production – lines.
The inspection was done by using ultrasonic detector,(echo – pulse method), a
straight – beam pr
obe was used as a transducer and receiver, at the same time.
The results of inspection showed the possibility of accurate defect determination in
steel billets, and also showed a good agreement between the experimental results and the
number of stopping and breaking in production in factory, and also the necessity to use that
inspection method in the imported billets which cause the continuous breaking in the
production – lines.
The use of Nickel-Titanium rotary instruments have been increasing in the last two
decades. But the probability of fracture is still the most important hindrance that confuse
the practitioners. And many clinicians claim that the removal process is
very difficult and
often irretrievable. When compared with stainless steel instruments, hence this study aims
to compare between the two types effect of endodontic instruments on the success of
microsonic technique in removing or bypassing it, and the degree of difficulty.
Fetus images produced by 2D ultrasound devices are ambiguous and lack precision. This led to the need
for offering a 3D visualization of the fetus, which allows visualizing width, height, and angle, in order to
get additional information about the
fetus, and detect fetus abnormalities.
We explain in this paper our method in producing 3D models of the fetus from 2D images using a
computer system without the need for changing the 2D imaging devices, and without using position
sensors.
Our method is based on passing the probe over the pregnant woman's abdomen and make a manual scan
for the entire body of the fetus from top of the head till the bottom of his feet, then it saves this scan as a
video clip then send, it to the computer which segments the video into multiple images which are saved and
later processed using digital processing principles of images. Then these processed images are
reconstructed to produce the volume matrix and then display it in a 3D form using 3D model construction
methods.
We applied our software on various fetuses of different ages and got volume images which are considered
good in comparison with the images offered by currently available systems and devices. The precision of
the images we got, differs according to the change in fetus pose, amniotic liquid, and fetus size, The
obstetrician or gynecologist can retrieve more precise details by changing the angle and displaying volume
images of certain part of the fetus body.
The purpose of this research is to detect, locate, and define the blood vessels
in the arm of any person who has a problem in taking samples of blood for
laboratory testing in order to make it easier, not dangerous nor harmful.
Depending on the pr
operties of the scattering wave from the blood and the
depth of the penetration, we have calculated the frequency which is
necessary to choose the suitable transducer including the Geometric
Dimension as well as the materials which is made from (we have taken the
5MHz Doppler –CW for 1.2 cm depth, 2.37 attenuation ratio and the 8MHz
Doppler –CW for 0.74 cm depth , with the same attenuation ratio).
Depending on the velocity's variation of the blood flow throughout the
Biodynamic studies for important arteries in the upper limb, we have found
the Doppler frequency which occurs when the acoustic wave passes across
the blood red cell. We have designed a suitable electronic instrument which
includes the transmitter circuit, receiver circuit, and the output unit - Audio
graph.
PIVH is the most common neonatal intracranial hemorrhage.
Incidence range between20-59% .Most of PIVH occur in the first week of
life. There are different opinions about the time of onset and timing of
screening. This study aimed to know incidence
, symptoms, classification,
predisposing factors and outcome of PIVH in our NICU, and the best time
of screening .
Sweeteners are used as alternatives of Sugar because of their slow
absorption and incomplete metabolism in human body, which are positively
destinies in setting free small amount of calorie.
This research presents the influence of ultrasonic on th
e sorbitol synthesis,
starting from Glucose by implementing hydrogenation using Lithium
Aluminum Hydride. The result we have reached by using the ultrasonic as
compared with mechanical mixing or other method have lead us to two
conclusions:
The first was that we have obtained almost the same quantity of the sorbitol.
The second was that by using ultrasonic, micelles of colloid Aluminum
hydroxide were accumulated. This accumulation resulted in an easy separation
by purification, which eventually lead to a super pure sorbitol solution.
We hope that these results will be useful for the Crystallography science.
درس تأثير الأمواج فوق الصوتية في تفاعل هدرجة الغلوكوز، باستخدام الهيدروجين الناتج عن
تفاعل الماء مع مركب بور هيدريد الصوديوم، و ذلك مقارنة مع تأثير التحريك الميكانيكي، أو ترك
المحلول في حالة ركود، فكانت النتيجة أن استخدام الأمواج فوق الصوتية يؤدي إ
لى زيادة كمية
السوربيتول الناتجة عن الهدرجة، و ذلك عند دراسة تأثير تغير كل من عامل الزمن، و التركيز
و حموضة الوسط في تفاعل الهدرجة، و على من الرغم أن الزيادة متواضعة إلا أنها تشجع على دراسة
تفاعلات اصطناع كيميائي أخرى قد تكون نتائجها مميزة. و قد أمكن متابعة هذا التفاعل و بشكل
دقيق بإجراء التحاليل على جهاز الكروماتوغرافيا السائلة ذات الأداء المرتفع الذي يعتمد على تحديد
كمية الغلوكوز غير المتفاعلة، و كمية السوربيتول الناتجة في وقت واحد.
Bleaching process of cotton fabrics consider an important and
sensitive operations in wet chemical treatments of cotton fabrics,
mercerization is not less important than them and that in cases in which
is made necessary, but from the problems of t
hese processes are long
time and consumption of energy, but the ultrasound energy contribute
to reduce these problems.
