Interventional MR imaging at 1.5 T: quantification of sound exposure

Sound pressure levels (SPLs) during interventional magnetic resonance (MR) imaging may create an occupational hazard for the interventional radiologist (ie, the potential risk of hearing impairment). Therefore, A-weighted and linear continuous-equivalent SPLs were measured at the entrance of a 1.5-T MR imager during cardiovascular and real-time pulse sequences. The SPLs ranged from 81.5 to 99.3 dB (A-weighted scale), and frequencies were from 1 to 3 kHz. SPLs for the interventional radiologist exceeded a safe SPL of 80 dB (A-weighted scale) for all sequences; therefore, hearing protection is recommended

Pengaruh Motivasi Kerja, Disiplin Kerja, dan Kepemimpinan terhadap Prestasi Kerja Pegawai di Badan Perpustakaan Provinsi Sulawesi Utara

Berhasil tidaknya Perusahaan sangat ditentukan oleh kualitas kepemimpinan, karena kedudukan pemimpin sangat sentral di Perusahaan. Motivasi adalah kemauan untuk berbuat sesuatu.Tujuan penelitian untuk mengetahui apakah motivasi kerja, disiplin kerja, dan kepemimpinan berpengaruh terhadap prestasi kerja pegawai di Badan Perpustakaan Provinsi Sulawesi Utara. Teknik pengambilan sample adalah simple random sampling dengan menggunakan rumus Slovin di dapat sebanyak 60 responden. Metode penelitian asosiatif dengan menggunakan teknik analisis regresi linear berganda.Hasil penelitian menunjukan bahwa motivasi kerja dan disiplin kerja berpengaruh signifikan terhadap prestasi kerja sedangkan kepemimpinan tidak berpengaruh signifikan terhadap prestasi kerja, sebaiknya pimpinan lebih memperhatikan disiplin kerja dan memberikan motivasi terhadap para karyawannya agar prestasi kerja karyawannya dapat meningkat. Kata kunci: motivasi kerja, disiplin kerja, kepemimpinan, prestasi kerj

Shrinkage of the distal renal artery 1 year after stent placement as evidenced with serial intravascular ultrasound

The objective of this study was to determine the quantitative intravascular ultrasound (IVUS) and angiographic changes that occur during 1 year follow-up after renal artery stent placement, given that restenosis continues to be a limitation of renal artery stent placement. 38 consecutive patients with symptomatic renal artery stenosis treated with Palmaz stent placement were studied prospectively. IVUS and angiography were performed at the time of stent placement and at 1 year follow-up. At follow-up, angiographic restenosis was seen in 14% of patients. The lumen area in the stent, seen with IVUS, was significantly decreased from 24+/-5.6 mm(2) to 17+/-5.6 mm(2) (p<0.001) solely due to plaque accumulation. The distal main renal artery showed a significant decrease in lumen area owing to a significant vessel area decrease from 39+/-14.0 mm(2) to 29+/-9.3 mm(2) (p<0.001) without plaque accumulation. Angiographic analysis confirmed this reduction in luminal diameter and showed that the distal renal artery diameter at follow-up was significantly smaller than before stent placement (86+/-23.0% vs 104+/-23.9% of the contralateral renal artery diameter; p=0.003). Besides plaque accumulation in the stent, unexplained shrinkage of the distal main renal artery was evidenced with IVUS and angiography 1 year following stent placement

Gambaran Kualitas Hidup Saudara Kandung Penyandang Autism Spectrum Disorder (Penelitian pada Remaja Akhir di Jakarta)

Autism Spectrum Disorder (ASD) in families affect sibling’s quality of life. Quality of life is an individual's perception of life in cultural contexts and values in the environment. It consists of subjective and objective domain. This study used a qualitative approach. Interviews with two subjects were implemented. The results showed that siblings generally have a good quality of life; but not in dimensions of joint activity and environmental acceptance. Factors affecting the quality of life is parenting practises, disability level, the values, and economic status

A precious metal alloy for construction of MR imaging-compatible balloon-expandable vascular stents

The authors developed ABI alloy, which mechanically resembles stainless steel 316. The main elements of ABI alloy are palladium and silver. Magnetic resonance (MR) images and radiographs of ABI alloy and stainless steel 316 stent models and of nitinol, tantalum, and Elgiloy stents were compared. ABI alloy showed the least MR imaging artifacts and was more radiopaque than stainless steel 316. ABI alloy has the potential to replace stainless steel 316 for construction of balloon-expandable MR imaging-compatible stents