Bahk Y W, Kim S H, Chung S K, Kim J H
Samsung Cheil Hospital, Samsung Medical Center, Seoul, Korea.
J Nucl Med. 1998 Aug;39(8):1444-8.
This article describes dual-head pinhole bone scintigraphy (DHPBS), which makes use of two opposing pinhole-collimated detectors to obtain one pair of magnified images of bone and joint at one time. The aims are to reduce scan time and solve the problem of the blind zone that is created in the background in single-head pinhole bone scintigraphy.
DHPBS was used for normal hip and knee joints and one case each of lumbar spondylosis, vertebral compression fracture and pyoankle. The gamma camera used was a digital dual-head SPECT camera (Sopha Camera DST; Sopha Medical Vision International, Buc Cedex, France) connected to an XT data processor and a printer. Each of two opposing detectors was collimated with either a 3- or 5-mm pinhole collimator. The scan was performed 2-3 hr postinjection of 12-25 mCi 99mTc-oxidronate. Some 1500-2000 Kilocounts were accumulated at 15-40 min per pair. Anterior and posterior views were taken for the spine and hip and medial and lateral views for the knee and ankle. DHPBS images were correlated to radiographs.
DHPBS produced a pair of high-resolution bone and joint images at one time, reducing scan time by nearly half for each image. The paired DHPBS images clearly visualized both foreground and background objects, which effectively eliminated the blind zone.
DHPBS can significantly improve efficiency and diagnostic acumen.
本文介绍了双头针孔骨闪烁显像（DHPBS），它利用两个相对的针孔准直探测器一次获得一对骨骼和关节的放大图像。目的是减少扫描时间并解决单头针孔骨闪烁显像中背景产生的盲区问题。
DHPBS用于正常髋关节和膝关节以及腰椎间盘突出症、椎体压缩性骨折和脓性踝关节各1例。使用的γ相机是一台数字双头SPECT相机（Sopha Camera DST；Sopha Medical Vision International，法国布克 Cedex），连接到XT数据处理器和打印机。两个相对探测器中的每一个都用3或5毫米的针孔准直器准直。在注射12 - 25毫居里99mTc - 奥曲膦酸盐后2 - 3小时进行扫描。每对图像在15 - 40分钟内积累约1500 - 2000千计数。对脊柱和髋关节拍摄前后位图像，对膝关节和踝关节拍摄内外侧位图像。DHPBS图像与X线片进行对比。
DHPBS一次产生一对高分辨率的骨骼和关节图像，每个图像的扫描时间减少了近一半。成对的DHPBS图像清晰地显示了前景和背景物体，有效消除了盲区。
DHPBS可显著提高效率和诊断敏锐度。
