If you are looking for image annotation tools you can find the unlimited number of online services and free tools available to annotate pictures into different formats. However, if you are seeking for tools useful for medical imaging annotation in order to build ML data sets it would be difficult to find the suitable tools or any other software that can annotate pictures for you and such images is going to be used for other purpose.
Actually, when you need such annotate images for machine learning you need to keep the annotation quality at highest level. And image annotation done with free tools or online software would be compromised with the accuracy. And here you have mentioned that person going to use these annotated pictures for machine learning can interpret the images but not skilled or expert enough to use codes and algorithms to develop the machine learning datasets or cannot utilize such annotated images for machine learning.
At this stage you need to hire professionals providing medical image annotation services to annotate medical images with highest accuracy that can used to build machine learning datasets to train such machine working on AI-based models. Cogito Tech is providing medical imaging data sets with annotation service to help users to build machine learning datasets with the highest quality and maximum accuracy.
Cogito is specialized in image annotation companies for service with specialization is medical imaging and machine learning healthcare data with well-organized infrastructure and facilities to help healthcare industry to develop AI-based models with highest success rates. Cogito has dedicated and fully managed team works to co-develop new AI modules with right sensitivity and specificity to deliver the best annotation service. It will defiantly help you in medical imaging annotation with scalable solution for annoying large volume of images with best level of accuracy to give you best service at best pricing.