Gamma cameras are used in nuclear medicine examinations involving radioisotopes; however, they do not provide real-time feedback. We propose a real-time imaging method based on a commercially available digital camera and a scintillator array to provide simple and accurate measurements of radioisotope accumulation and contamination. We evaluate the sensitivity and resolution of the proposed device using x-rays as a proxy for gamma-rays. The performance of the device is demonstrated using PENTAX KP and ORCA-spark C11440-36U digital cameras. A caesium iodide scintillator array is irradiated with x-rays, with the state of light emission confirmed using live view images. The pixel value is evaluated as a function of dose rate. Furthermore, we investigate the state of light emission in response to amplifying the light signal using an image intensifier. For the PENTAX KP, luminescence is observable for a dose rate of approximately 10 mSv h⁻¹, which changes to 2.1 mSv h⁻¹ when an image intensifier is used. Notably, the ORCA-spark detected emission at a low dose rate of 0.06 mSv h⁻¹. However, using an image intensifier resulted in noisier images. Therefore, although the ORCA-spark can observe luminescence at a suitable predicted dose rate for application in nuclear medicine examinations, a collimator is required to control the spread of gamma rays. However, as this causes the sensitivity to decrease, increasing the amount of light emitted by the scintillator and improving the sensitivity of the camera is vital.

伽马相机用于涉及放射性同位素的核医学检查；但是，它们不提供实时反馈。我们提出了一种基于市售数码相机和闪烁体阵列的实时成像方法，以提供简单而准确的放射性同位素积累和污染测量。我们使用 X 射线作为伽马射线的代理来评估所提出设备的灵敏度和分辨率。使用 PENTAX KP 和 ORCA-spark C11440-36U 数码相机演示了该设备的性能。用 X 射线照射碘化铯闪烁体阵列，使用实时取景图像确认发光状态。像素值被评估为剂量率的函数。此外，我们研究了响应于使用图像增强器放大光信号的光发射状态。^-1 ，当使用图像增强器时变为 2.1 mSv h ^{-1 。值得注意的是，ORCA 火花在 0.06 mSv h -1}的低剂量率下检测到发射。但是，使用图像增强器会导致图像噪声更大。因此，虽然 ORCA-spark 可以在合适的预测剂量率下观察到用于核医学检查的发光，但仍需要准直仪来控制伽马射线的传播。然而，由于这会导致灵敏度下降，因此增加闪烁体发出的光量并提高相机的灵敏度至关重要。