Monday 11 September 2017

SOME LAPAROSCOPIC PROBES


1. SIEMENS ACUSON P300 LP323


  • Frequency range : 4-13 MHz
  • Selectable THI(TEI) frequencies and penetration
  • Articulation : +/- 90 degree up or down ,  +/- 90 degree left or right

2. HITACHI- L44LA



  • Linear laparoscopic 4- way probe
  • Frequency range : 2-13 MHz
  • Compatible with : AIETTA Systems

3. HITACHI- L44LA1

  • Linear laparoscopic rigid probe
  • Frequency range : 2-13MHz
  • Compatible with : AIERTTA Systems

4. HITACHI- EUP-OL334


  • Convex laparoscopic probe
  • Frequency range : 5-10 MHz
  • Compatible with : HI VISION Systems

5. HITACHI- UST-5418

  • Linear laparoscopic 4-way probe
  • Frequency range : 2-13 MHz
  • Compatible with : Prosound Systems

6. HITACHI- UST-5550

  • Linear laparoscopic 2-way probe
  • Frequency range : 2-13 MHz
  • Compatible with : Prosound Systems

7. HITACHI- UST-52109


  • Rigid end fire Laparoscopic sector probe
  • Frequency range : 2-13MHz
  • Compatible with : Prosound Systems

8. BK MEDICAL 8666-RF


  • 4-Way laparoscopic probe
  • Frequency range : 4.3-10 MHz
  • Flexible for difficult to reach areas

9. BK MEDICALS I12C4f

  • 4-way laparoscopic probe
  • Frequency range : 4-12 MHz
  • Ethanol or contrast agent injections

10. BK MEDICALS  8836
  • Rigid convex laparoscopic probe
  • Frequency range : 5-12 MHz
  • Compatible with modern sterilization methods

To know about more Laparoscopic probes contact us

Wednesday 6 September 2017

ULTRASOUND TRANSDUCER CHARACTERISTICS FOR IMAGING


1. ACOUSTIC WINDOW
  •  Standard acoustic window provides an unobstructed view of organ or region.
  • Typical windows are located in or on the head, chest, abdomen, pelvis, vessels and various orifices of the body.
  • Transducer can associated with certain regions through latin prefixes like:

Trans :- through or across  
Intra : - Into or inside
Endo :- within. 
  • For example Transthoracic means Image through chest.
  • For each type of acoustic window; a particular type transducer is used to get the required sonographic data.
  • Eg:- phased arrays are used for transthoracic window and convex arrays are used for abdominal window.
An acoustic window showing artery and vain


2. PENETRATION 
  • Penetration is the minimum scan depth at which electronic noise is visible; despite optimization of available control.
  • It can be primarily determined by the center of the frequency of the transducer.
  • That is the transducer having high frequency will have low penetration.
Relationship between frequency and penetration

3. SPACIAL RESOLUTION
  • It is the ability to discern the smallest possible dimension in both axial and lateral directions.
  • Axial resolution refers to the ability to distinguish two structures that lie along the axis (i.e. parallel) of the ultrasound beam as separate and distinct.
  • Axial resolution is determined by the pulse length.
  • Lateral resolution refers to resolution of objects lying side by side (i.e., perpendicular to the beam axis).
  • Lateral resolution is directly related to the transducer beam width, which in turn is inversely related to the ultrasound frequency.


4. TRANSDUCER PARAMETERS
  • It includes:
  1. Efficiency
  2. Signal to Noise Ratio,
  3. Absorbtion of the tissues
  4. Band width 
  5. Number of elements in transducer etc. 

WHEN WE NEED TO REPAIR THE PROBE ???? Many of the probe damages are repairable at initial state. But in many cases the Practitio...