UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 単胎妊娠の胎児サベーランスに対する臍動脈のドップラー超音波検査doppler ultrasound of the umbilical artery for fetal surveillance in singleton pregnancies [show details]
… Doppler ultrasound waveforms are derived from Doppler frequency shifts generated by sound waves reflected by red cells moving in a circulation. Analysis of a Doppler waveform yields information on the …
2. 下肢末梢動脈疾患の高度な血管画像検査advanced vascular imaging for lower extremity peripheral artery disease [show details]
… electromagnetic tracking systems also require coregistration of anatomic landmarks with a prior CBCT and/or CT angiography . Electromagnetic systems require generation of an electromagnetic field… to be understood to optimize patient outcomes. The benefits, risks, and imaging advances in duplex ultrasound, intravascular ultrasound, computed tomographic (CT) angiography, magnetic resonance (MR) angiography …
3. 甲状腺疾患における超音波検査の臨床的有用性の概要overview of the clinical utility of ultrasonography in thyroid disease [show details]
4. ドップラー心エコーの原理principles of doppler echocardiography [show details]
…backscatter along the entire length of the beam is received. Depth resolution is achieved with pulsed Doppler using the duration of the "wait" period. However, signals from exactly twice (or 3x, 4x, etc) the distance…
5. 腸骨静脈閉塞症の概要overview of iliocaval venous obstruction [show details]
…treatment is pursued. Venous duplex ultrasound allows functional, anatomic, and dynamic evaluation of the status of the deep veins of the involved extremity. However, duplex ultrasound may be technically challenging …