Features | Partner Sites | Information | LinkXpress
Sign In
RANDOX LABORATORIES
SEEGENE
AB Sciex

Smart Petri Dish Simplifies Medical Diagnostic Tests

By Labmedica International staff writers
Posted on 13 Oct 2011
Image: The ePetri platform is built from Lego blocks and uses a smart phone as a light source. The imaging chip is seen in detail on the right (Photo courtesy of Guoan Zheng, Caltech).
Image: The ePetri platform is built from Lego blocks and uses a smart phone as a light source. The imaging chip is seen in detail on the right (Photo courtesy of Guoan Zheng, Caltech).
A smart Petri dish does away with the need for bulky microscopes and significantly reduces human labor time, while improving the way in which bacterial culture growth can be recorded.

Imaging sensor chips, similar to those in built-in cameras of cell phones, transform the way cell cultures are imaged by serving as a platform for the smart Petri dish. The device, dubbed ePetri, was built by engineers at the California Institute of Technology (Caltech; Pasadena, CA, USA) using a Google smart phone, a commercially available cell-phone image sensor, and Lego building blocks.

The culture is placed on the image-sensor chip, while the phone's LED screen is used as a scanning light source. The device is placed in an incubator with a wire running from the chip to a laptop outside the incubator. As the image sensor takes pictures of the culture, the information is sent out to the laptop, enabling scientists to acquire and save images of the cells as they are growing in real time. The technology is particularly useful for imaging confluent cells--those that grow very close to one another and typically cover the entire Petri dish.

Biologists use Petri dishes primarily to grow cells. In the medical field, they are used to identify bacterial infections, such as tuberculosis. Conventional use of a Petri dish requires that the cells being cultured be placed in an incubator to grow. As the sample grows, it is removed--often numerous times--from the incubator to be studied under a microscope.

"Our ePetri dish is a compact, small, lens-free microscopy imaging platform. We can directly track the cell culture or bacteria culture within the incubator," explained Guoan Zheng, lead author of the study and a graduate student in electrical engineering at Caltech. "The data from the ePetri dish automatically transfers to a computer outside the incubator by a cable connection. Therefore, this technology can significantly streamline and improve cell culture experiments by cutting down on human labor and contamination risks."

Changhuei Yang, senior author of the study and professor of electrical engineering and bioengineering at Caltech, and his team believe that the ePetri system will open up a whole range of new approaches to many other biological systems. For example, ePetri could provide microscopy-imaging capabilities for other portable diagnostic lab-on-a-chip tools.

The team is working to build a self-contained system that would include its own small incubator. This would make the system more useful as a desktop diagnostic tool that could be housed in a doctor's office, reducing the need to send bacteria samples out to a lab for testing.

The device is described in a paper that appears online in the Proceedings of the National Academy of Sciences (PNAS) in September 2011.

Related Links:
California Institute of Technology




ADVANCED INSTRUMENTS
GREINER-BIO-ONE
PURITAN MEDICAL
BioConferenceLive

Channels

Genetic Tests

view channel
Image: The QuantiTect Reverse Transcription Kit (Photo courtesy of Qiagen)

Blood Tests Predict Risk of Sudden Cardiac Death

A simple blood test can predict a person's risk for sudden cardiac death, enabling physicians to quickly and accurately assess a patient's need for an implantable cardiac defibrillator (ICD).... Read more

Hematology

view channel

Blood Donations Screened for Viruses Using Multiplex Assay

A global healthcare company was chosen to partner the Japanese Red Cross (JRC; Tokyo, Japan) for nucleic acid screening of the nation's blood supply. Under the terms of the 7-year agreement, the healthcare company, Grifols (Barcelona, Spain) will provide the JRC with its newest automation platform, the Procleix Panther... Read more

Pathology

view channel

Gene Profile Predicts Risk of Bladder Cancer Recurrence

A genomic study has pinpointed several markers that identify bladder cancer patients at risk of recurrence and that may be indicators of overall survival status. Nearly half of patients with bladder cancer experience recurrences, so reliable predictors of this recurrent phenotype are needed to guide surveillance and treatment.... Read more

Industry News

view channel

Beckman Coulter and hc1.com Enter Strategic Partnership for Innovative Healthcare Cloud System

The diagnostics division of Beckman Coulter (Brea, CA, USA) and hc1.com (Indianapolis, IN, USA) have announced a partnership to bring an innovative healthcare cloud-technology system to clinical laboratories. The system, hc1.com's "Healthcare Relationship Cloud," helps turn large amounts of clinical data into actionable... Read more
 
Copyright © 2000-2014 Globetech Media. All rights reserved.