Signal processing pathway for an ultrasonic imaging device
A signal processing pathway for an ultrasonic imaging device is provided. The signal processing pathway is configured to operate in a frequency range of 1 MHz to 40 MHz inclusive and a voltage range of −80 V to +80 V inclusive.
1. A signal processing pathway for an ultrasonic imaging device, the signal processing pathway comprising:
a channel board configured to transmit a transmitted signal to an ultrasonic transducer array, and further configured to receive a received signal from the ultrasonic transducer array further comprises:
a transmit/receive switch for switching between a transmit pathway and a receive pathway;
a transmit beamformer situated in the transmit pathway for controlling a timing and a shape of the transmitted signal;
a pulser situated in the transmit pathway between the transmit beamformer and the transmit/receive switch for adjusting a voltage of the transmitted signal;
a receive beamformer situated in the receive pathway for storing and transferring, at least in part, the received signal;
an ADC (analog/digital converter) situated in the receive pathway between the transmit/receive switch and the receive beamformer for converting the received signal;
a VGA (variable gain amplifier) situated in the receive pathway between the transmit/receive switch and the receive beamformer for amplifying selected properties of the received signal;
an AAF (anti-aliasing filter) situated in the receive pathway between the transmit/receive switch and the receive beamformer for preventing aliasing and for limiting a noise of the received signal; and
a LNA (low noise amplifier) situated in the receive pathway between the transmit/receive switch and the receive beamformer for amplifying the received signal; and
a beamformer control board configured to control the channel board;
wherein, the channel board and the beamformer control form the receive pathway and the transmit pathway that each have a bandwidth across a frequency range of 1 MHz to 40 MHz inclusive and for voltages within a range of −80V to +80V inclusive, the received signal traverses the receive pathway and the transmitted signal traverses the transmit pathway.
2. The signal processing pathway of claim 1 , further comprising: a transducer element multiplexer configured for selecting one or more ultrasonic transducer elements in the ultrasonic transducer array to be driven for each channel in the transmit pathway.
3. The signal processing pathway of claim 2 , the transmit pathway and the receive pathway have 128 channels, each channel being configured to transmit the transmitted signal and to receive the received signal from an ultrasonic transducer element in the ultrasonic transducer array.
4. The signal processing pathway of claim 2 , wherein, the transmit pathway has a first number of channels and the receive pathway has a second number of channels, the first number of channels and the second number of channels being proportional to the ultrasonic transducer in the ultrasonic array that has the highest transmit frequency so as to maintain a resolution operable to scan a human prostate.
5. The signal processing pathway of claim 4 , wherein, the transducer element multiplexer is a 4:1 multiplexer so that the ultrasonic transducer array having ultrasonic transducer elements is driven by the transmit pathway, the transmit pathway having 128 channels.
6. The signal processing pathway of claim 5 , further comprising:
a transducer switch for switching between two or more ultrasonic transducer arrays, wherein each of the ultrasonic transducer arrays is configured to operate in a frequency subrange of the signal processing pathway.
7. The signal processing pathway of claim 6 , wherein, there are three ultrasonic transducer arrays having a frequency band centered around 21 MHz, 6.5 MHz, and 3.5 MHz.
8. The signal processing pathway of claim 7 , wherein, the ultrasonic transducer array has a frequency band configured for scanning a human prostate.
9. The signal processing pathway of claim 8 , wherein, the signal processing pathway has a data bandwidth configured to allow for transfer of data from the channel board to a processing device.
10. The signal processing pathway of claim 9 , wherein, the signal processing pathway is configured on a daughterboard for an ultrasonic imaging device.
11. The signal processing pathway of claim 6 , further comprising a transducer switch configured as a hot-swap mechanism that enables the two or more transducer arrays to be used in the same signal processing pathway, wherein the transducer switch initializes a given ultrasonic transducer array for use in the ultrasonic imaging system.
12. The signal processing pathway of claim 6 , wherein the ultrasonic imaging device comprises a control pathway configured to select the ultrasonic transducer array from the two or more transducer arrays based on parameters characterizing dimensions of an object to be scanned.
13. The signal processing pathway of claim 1 , wherein the ultrasonic transducer array is capable of transmitting and receiving signals in the entirety of the frequency and voltage ranges of the signal processing pathway.
14. The signal processing pathway of claim 1 , wherein the ultrasonic imaging device generates a warning responsive to detecting that the ultrasonic transducer array for use in the ultrasonic imaging system uses a frequency and/or voltage outside the frequency and/or voltage ranges of the signal processing pathway.
15. The signal processing pathway of claim 1 , the beamformer control board is configured to compress the received signal to compress data communicated along the signal processing pathway.