Journal
SENSORS
Volume 21, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/s21041048
Keywords
gamma probe; ultrasound probe; hybrid systems; silicon photomultiplier (SiPM); nuclear medicine (NM)
Funding
- MSIT [2020R1A2C2007376, 2020M2A8A4023713, 2020R1A2C4001606]
- National Research Foundation of Korea (NRF)
- Korea Health Industry Development Institute (KHIDI)
- Ministry of Health & Welfare, Republic of Korea [HI17C0654]
- National Research Foundation of Korea [2020R1A2C2007376] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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An integrated front-end data acquisition circuit for a hybrid ultrasound-gamma probe was proposed, enabling simultaneous data acquisition from both systems with good performance.
We propose an integrated front-end data acquisition circuit for a hybrid ultrasound (US)-gamma probe. The proposed circuit consists of three main parts: (1) a preamplifier for the gamma probe, (2) a preprocessing analog circuit for the US, and (3) a digitally controlled analog switch. By exploiting the long idle time of the US system, an analog switch can be used to acquire data of both systems using a single output channel simultaneously. On the nuclear medicine (NM) gamma probe side, energy resolutions of 18.4% and 17.5% were acquired with the standalone system and with the proposed switching circuit, respectively, when irradiated with a Co-57 radiation source. Similarly, signal-to-noise ratios of 14.89 and 13.12 dB were achieved when US echo signals were acquired with the standalone system and with the proposed switching circuit, respectively. Lastly, a combined US-gamma probe was used to scan a glass target and a sealed radiation source placed in a water tank. The results confirmed that, by using a hybrid US-gamma probe system, it is possible to distinguish between the two objects and acquire structural information (ultrasound) alongside molecular information (gamma radiation source).
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