31 results about "Photoacoustic Techniques" patented technology

The invention provides a bowl-type photoacoustic imaging breast scanning device and a scanning method thereof. The bowl-type photoacoustic imaging breast scanning device comprises a bowl-type photoacoustic probe, wherein the bowl-type photoacoustic probe comprises a bowl-type outer support, a laser beam expander is arranged outside the outer support, the inner wall of the outer support is an inner diffuse reflection cavity wall, and an ultrasonic transducer is arranged on the inner diffuse reflection cavity wall. During scanning, the a ultrasonic coupling agent is injected into the bowl-type photoacoustic probe, a breast to be detected is put in the bowl-type photoacoustic probe, the light from a laser is introduced into the bowl-type photoacoustic probe through a reflecting mirror and expanded, the photoacoustic signals at different angles are detected by the ultrasonic transducer and transmitted to a processor where a three-dimensional photoacoustic image of the breast is formed. By the photoacoustic imaging technique in combination with the routine ultrasonic imaging technique, the non-invasive portable photoacoustic imaging breast scanning device can rapidly scan and image breasts with high contrast and high precision and depth and achieve non-invasive and non-radioactive early diagnosis and treatment of breast cancer.

The invention relates to a detection method of a microfluidic chip based on a photoacoustic technique and a device thereof. The detection method comprises the following steps of: adopting the microfluidic chip consisting of an incident light generating unit A, a photoacoustic signal detection unit B, a signal processing and data conversion unit C, a computer processing unit D and a platform capable of translating in double directions of X direction and Y direction; adding pretreated samples to be detected into the microfluidic chip for electrophoresis, emitting signals by the computer processing unit according to commands, and controlling electrophoresis and high voltage after being converted by a single chip microprocessor D / A; under the effect of electric field, separating samples with different mobility according to different mobility, absorbing light power by the samples to generate photoacoustic signals by a spot detection window, collecting photoacoustic signals by an ultrasonicsensor, converting the photoacoustic signals into electric signals, converting the photoacoustic signals received by the sensor into digital signals by an analog-to-digital converter and being capable of determining the types and properties of the samples to be detected after being processed by signals of the computer. The detection method has the advantages of high sensitivity, low cost and convenient operation.