Foreign body detection approaches in food products

The presence of foreign bodies (FBs) in food and drinking products are major concern to the producer. They often include pests, metal, glass and plastic pieces. However they may be a healthy eating and drinking but are not main product such existing a bean in canned tomato paste. To prevent any potential harm to consumers and maintain their confidence it is necessary for the food industry that all foreign bodies are detected and removed from food products before they reach the consumers. In this paper we evaluate and discuss about using different approaches for detection of foreign bodies. There are many non-destructive method to detect them ranging from simple to complex which the most important of them are include optical, microwave reflectance, nuclear magnetic resonance imaging, electrical impedance, ultrasound, X-rays etc. The objective of this article was summarizing the mentioned approaches to food quality assurance with respect to foreign body detection.