For example, in Poland the availability of CT and MRI scanners is still suboptimal, and as the number of patients has increased in recent years, the waiting list for diagnostic services involving these devices has lengthened. For instance, the Slovak Republic has invested in expensive radiotherapy equipment and linear accelerators for state-owned cancer care institutions and university hospitals, and Poland has also invested in therapeutic equipment. The highest density is in Switzerland, with 16.5 radiotherapy devices per million population, over thirty times higher than the lowest density country, Israel (0.5), as is shown in Figure 2.4. Switzerland is followed by Belgium (14.5) and the Slovak Republic (13.5), while Israel is preceded by Hirkey (1.9), Estonia (2.2) and Poland (2.8).