FREQUENTLY ASKED QUESTIONS
Below are a list of frequently asked questions. Please don't hesitate to get in contact if you have any further questions or need clarifications
How long will the system run for?
As long as is needed. Our systems capture data 24 hours a day, 7 days a week ensuring you never miss key events
How many rodents can be tested in one cage?
Three is optimal to achieve highly accurate identification and tracking. Four may be possible, however as numbers increase there will be more events where the video is occluded..
Is the system different for mice and rats?
Yes. Mice and rats obviously differ in size, as do their cages, so our systems are calibrated accordingly. Different baseplates are required for each species and in the case of mice smaller RFID chips may be used (subject to system setup) however only the Biomark Biotherm 13 will provide temperature data.
Do I need to fund any of my own equipment?
Installation, support, software and the entire system are all included. You only need to provide your own standard cages and rodents
What about different enrichment, such as "huts", and what that will do to activity? What about different bedding?
Bedding comes in various forms, but very thick bedding can lead to poorer data. Enrichment is no problem; translucent red plastic tubes are very easy to integrate as the HCA's infra-red camera can see right through them. If you use opaque plastic or cardboard the camera will not be able to detect rodent behaviour, but positional data collection from the RFID chip is retained.
How quickly can i see my data?
What, if any, are the size restrictions for the rodents? Is there a suggested body weight range to ensure proper tracking?
We have not come across any animals that are too large or small yet. Very young pups may be too small for the RFID tags.
How do you analyse the "cage" factor in pharmacology studies when animals are housed in collective cages?
In collective cages you can run all animals under the same treatment regime or put them in mixed groups. The choice depends on the study design and what other tests are planned for the animals. With either variation, individual identity retention and tracking means you can automatically measure interactions between cage mates during the study. You will also have the videos if specific dominant traits need to be confirmed.
Can you talk more about the automated scoring algorithms? What tracking information is going into the classifiers? Can the user train new classifiers for behaviours?
Are there specific brands or types of IVC units it is designed for?
Yes, we have working systems using Tecniplast Blue Line and Green Line and Allentown Type 2 cages. Others are available upon request.
How do you deal with animals being hidden behind cage mates, or bedding/nesting material?
The baseplate and RFID do the majority of that work, even when the animals are hidden you can still identify who is who, their location, and how mobile they are. The camera experiences rare occlusion events, but these are minor in the context of the entire multi-day data set.
What are the computer and network requirements (infrastructure) on the front and back end to adequately drive the analysis software and collect data?
We supply the front-end software with each system. The back end requires a server, but we have designed such that low specification workstations/servers can be used. Most of our customers use sub-$2000 servers for four to eight cages. The systems need network access (typically DHCP) but this can be within a confined intranet. 100BaseT or gigabit Ethernet is ideal. The systems can be accessed remotely, but this needs to be handled by your local network support team.
What are the 3Rs benefits?
What else can the system be used for beyond the examples given?
The system will automatically detect abnormal motor events. Instead of examining hours of video footage, you can simply manually assess the abnormal behaviour and verify the event; a convulsion, for example. ActualHCA also offers exciting possibilities for defining aggression better and to time mating properly, which in turn offers the opportunity to study fertility much more closely.As well as this, the opportunity to study the social interaction of rodents within their true home cage is valuable. The system is designed to ensure that all the raw data is securely stored, for as long as you need or want it. If you want to apply new algorithms to existing footage instead of repeating an experiment, you can.